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Search: id:A101171
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A101171 a(n) divides the number formed by concatenating the sum of the digits of a(n) with a(n), by a factor not previously used. +0
2
1, 12, 15, 18, 25, 45, 75, 125, 1125, 1875, 5625, 16875, 140625, 1171875 (list; graph; listen)
OFFSET

1,2

COMMENT

No more terms < 10^100. - David Wasserman (dwasserm(AT)earthlink.net), Mar 06 2008

EXAMPLE

a(3) = 15 because the digit sum of 15 is 6, and 615/15 = 41. Any future number which divides its digit sum concatenated with itself by exactly 41 (such as 150, 225, 375, etc.) will be excluded.

CROSSREFS

Cf. A101170.

Sequence in context: A139310 A115402 A114443 this_sequence A120169 A115349 A117815

Adjacent sequences: A101168 A101169 A101170 this_sequence A101172 A101173 A101174

KEYWORD

base,nonn,more

AUTHOR

Chuck Seggelin (seqfan(AT)plastereddragon.com), Dec 03 2004

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.


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