login
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
OFFSET
1,1
EXAMPLE
3151 is the 46th pentagonal number and 1513=17*89 is brilliant.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Jan 31 2006
STATUS
approved