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A115703
Pentagonal numbers (
A000326
) whose digit reversal is the product of 2 palindromes greater than 1.
0
12, 22, 51, 210, 330, 425, 1162, 2882, 3876, 4510, 6902, 8400, 9801, 14652, 15251, 22632, 27270, 29330, 32340, 52360, 54055, 55777, 58707, 66676, 68587, 104412, 197472, 217551, 279720, 298151, 319935, 341055, 448540, 468442, 481950
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..35.
EXAMPLE
14652 is the 99th pentagonal number and 25641=77*333.
CROSSREFS
Cf.
A000326
,
A115683
.
Sequence in context:
A153361
A200197
A115709
*
A014633
A298323
A299216
Adjacent sequences:
A115700
A115701
A115702
*
A115704
A115705
A115706
KEYWORD
nonn
,
base
AUTHOR
Giovanni Resta
, Jan 31 2006
STATUS
approved
