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Fragments of a larger pattern

41
82
205
902
2,009
5,002
10,004
20,008

Comments

( 4 comments — Leave a comment )
geekette8
Mar. 10th, 2014 04:09 pm (UTC)
The first and last digits can be (either way round): 1 and 4; 2 and 5; 2 and 8; 2 and 9; and there can be 0 or more 0s in the middle? I'm suspecting there must be more to it than that...!
nwhyte
Mar. 10th, 2014 07:04 pm (UTC)
Not a lot more to it than that. A constraint is that these are numbers with only two non-zero digits - so 410, 4,100 and 41,000 are also in this set. Discounting multiples of ten, the next numbers in the sequence would be 4,000,001 and 8,000,002.
geekette8
Mar. 16th, 2014 08:51 pm (UTC)
I've been mulling this one over for days now. I give up!
nwhyte
Mar. 17th, 2014 04:50 am (UTC)
Multiples of 41 with only two non-zero digits!
( 4 comments — Leave a comment )

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