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A081862
(1/168)*(sigma_7(2n-1)-sigma_1(2n-1)).
0
0, 13, 465, 4902, 28483, 115995, 373503, 1017498, 2442492, 5320665, 10725680, 20266818, 36330915, 62292490, 102677835, 163765560, 253797216, 382977372, 565070697, 817224746, 1159251630, 1617967923, 2225268903, 3015613812
OFFSET
1,2
MATHEMATICA
Table[(DivisorSigma[7, n]-DivisorSigma[1, n])/168, {n, 1, 49, 2}] (* Harvey P. Dale, Sep 17 2013 *)
CROSSREFS
Cf. A000203, A081863(3).
Sequence in context: A338177 A166184 A272656 * A198012 A197895 A197749
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Apr 11 2003
STATUS
approved