Spit out a list of missing numbers in sequence?

[wings1080]

Any easy way to have excel make a list of numbers missing in a sequence? For example in the list below, the list would be like - 4,9,15, etc.... THANKS!

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[hoyasaxa215]

Couldn't this be done with an =IF statement checking if the difference between two numbers is greater than 1?

[wings1080]

YES, but ultimately I would like a list to be produced more automatically than having to go through each instance like this, I have a list of thousands of numbers etc...

[hoyasaxa215]

Well the =IF statement could be a helper column, and then you could create a consolidated list of the results wherever you'd like. Will you be performing this operation just once or repeatedly on different lists of numbers?

[JieJenn]

Perhaps have a template that has all the values available then do a vlookup to check the value, and autofilter to display the missing values

[MarvinP]

Hi,

Try this attached workbook. Look at the formulas in columns B and C.

[wings1080]

JieJenn, this is perfect, can you explain a little bit about how you created the pulldown menu thingies?

[JieJenn]

You mean autofilter?

https://support.office.com/en-ca/art...6-27b932e186e0

[wings1080]

yes ... thanks

[WHER]

Another option:

[boopathiraja]

hi, Try this array formula

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Ref the attachment..

[FlameRetired]

Another array formula approach:

[waichigo]

You may also an array formula as shown below: The formula compares the numbers against the row numbers (which are static) and gives an output of the specific 'row number' that is missing from the array

=SMALL(IF(COUNTIF(A:A,ROW($A$1:$A$620))=0,ROW($A$1:$A$620),""),ROW())

[waichigo]

You may also an array formula as shown below: The formula compares the numbers against the row numbers (which are static) and gives an output of the specific 'row number' that is missing from the array

=SMALL(IF(COUNTIF(A:A,ROW($A$1:$A$620))=0,ROW($A$1:$A$620),""),ROW())