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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
OFFSET
1,1
EXAMPLE
14652 is the 99th pentagonal number and 25641=77*333.
CROSSREFS
Sequence in context: A153361 A200197 A115709 * A014633 A298323 A299216
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Jan 31 2006
STATUS
approved