A081862 (1/168)*(sigma_7(2n-1)-sigma_1(2n-1)).

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

Author

Benoit Cloitre, Apr 11 2003

Keywords

• nonn

Crossrefs

Cf. A000203, A081863(3).

Programs

Mathematica

Table[(DivisorSigma[7,n]-DivisorSigma[1,n])/168,{n,1,49,2}] (* Harvey P. Dale, Sep 17 2013 *)