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A373039
a(n) = (A372966(n) - 1)/240.
1
0, 1, 27, 257, 1625, 6508, 24010, 65793, 177174, 391626, 893101, 1665644, 3398759, 5786411, 10531652, 16843009, 29065308, 42698935, 70764303, 100231882, 155608837, 215237342, 326294606, 426404460, 634767250, 819100920, 1162438641, 1480961067, 2084357107, 2538128133
OFFSET
1,3
PROG
(PARI) a(n) = (sigma(n^2, 8)/sigma(n^2, 4)-1)/240
CROSSREFS
KEYWORD
nonn
AUTHOR
Hugo Pfoertner, May 20 2024
STATUS
approved