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A028386 Numbers k such that k*(3k-1)/2 is a pentagonal palindrome. 4
1, 2, 4, 26, 44, 101, 693, 2173, 2229, 4228, 6010, 26466, 26906, 31926, 44059, 1258723, 1965117, 1979130, 2684561, 13280839, 59401650, 84885761, 100058581, 225563533, 316882086, 700457153, 818049201, 851649306, 1345679688 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A218258 A186431 A129894 * A362001 A259374 A155120
KEYWORD
nonn,base
AUTHOR
EXTENSIONS
More terms from Patrick De Geest, Nov 15 1998
STATUS
approved

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Last modified March 3 21:06 EST 2024. Contains 370517 sequences. (Running on oeis4.)