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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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 19 16:25 EDT 2021. Contains 348091 sequences. (Running on oeis4.)