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A115696 Pentagonal numbers (A000326) whose digit reversal is a powerful(1) number (A001694). 1
1, 925, 1426, 6112, 9801, 140301, 251945, 578151, 2112860, 78883630, 466005001, 52244922262, 394240923000, 527042773467, 706743866647, 797657661680, 869119510700, 1445531162626, 3905876132501, 5205252778462, 63253297234426, 135399021815552 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..22.

EXAMPLE

925 is the 25th pentagonal number and 529=23^2 is powerful.

CROSSREFS

Cf. A000326, A001694, A115695.

Sequence in context: A172912 A172702 A159701 * A066741 A325141 A244169

Adjacent sequences:  A115693 A115694 A115695 * A115697 A115698 A115699

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Jan 31 2006

EXTENSIONS

a(19)-a(22) from Donovan Johnson, Jun 29 2011

STATUS

approved

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Last modified December 6 20:22 EST 2021. Contains 349567 sequences. (Running on oeis4.)