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A115680 Pentagonal numbers (A000326) whose digit reversal is a brilliant number (A078972). 1
12, 51, 176, 715, 925, 1426, 3151, 3290, 10795, 15251, 16172, 19097, 79235, 92132, 114955, 117460, 119992, 127750, 150575, 355510, 755795, 779401, 1010651, 1108970, 1258126, 1274665, 1294097, 1463722, 1466687, 1675345, 1881040 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..31.

EXAMPLE

3151 is the 46th pentagonal number and 1513=17*89 is brilliant.

CROSSREFS

Cf. A000326, A078972, A115679.

Sequence in context: A166776 A200887 A236770 * A231298 A231359 A066757

Adjacent sequences:  A115677 A115678 A115679 * A115681 A115682 A115683

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Jan 31 2006

STATUS

approved

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Last modified December 16 09:06 EST 2019. Contains 330020 sequences. (Running on oeis4.)