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A377160
Numbers k such that A000217(k) is not cubefree.
1
15, 16, 26, 27, 31, 32, 47, 48, 53, 54, 63, 64, 79, 80, 81, 95, 96, 107, 108, 111, 112, 124, 125, 127, 128, 134, 135, 143, 144, 159, 160, 161, 162, 175, 176, 188, 189, 191, 192, 207, 208, 215, 216, 223, 224, 239, 240, 242, 243, 249, 250, 255, 256, 269, 270, 271, 272, 287, 288
OFFSET
1,1
PROG
(PARI) is_a377160(n) = n>1 && vecmax(factor(n*(n+1)/2)[, 2]) > 2
CROSSREFS
KEYWORD
nonn
AUTHOR
Hugo Pfoertner, Oct 18 2024
STATUS
approved