
4, 6, 6, 8, 8, 9, 8, 10, 8, 12, 8, 12, 8, 12, 12, 12, 8, 12, 8, 16, 12, 12, 8, 15, 12, 12, 10, 16, 8, 18, 8, 14, 12, 12, 16, 16, 8, 12, 12, 20, 8, 18, 8, 16, 16, 12, 8, 18, 12, 18, 12, 16, 8, 15, 16, 20, 12, 12, 8, 24, 8, 12, 16, 16, 16, 18, 8, 16, 12, 24, 8, 20
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OFFSET

1,1


LINKS



FORMULA

Sum_{k=1..n} a(k) ~ (15*n*(log(n) + 2*gamma  1) + n*(5*log(2) + 3*log(3))) / 6, where gamma is the EulerMascheroni constant A001620.


MATHEMATICA

Table[DivisorSigma[0, 6*n], {n, 1, 150}]


CROSSREFS

Cf. A000005, A099777, A372713, A372784, A372785, A372787, A372788, A372789, A372790, A372791, A372792.


KEYWORD

nonn


AUTHOR



STATUS

approved

