A081867 - OEIS

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A081867

a(n)=sigma_11(2n-1).

0

1, 177148, 48828126, 1977326744, 31381236757, 285311670612, 1792160394038, 8649804864648, 34271896307634, 116490258898220, 350279478046112, 952809757913928, 2384185839843751, 5559091947792280, 12200509765705830

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..15.

MATHEMATICA

Table[DivisorSigma[11, 2n-1], {n, 20}] (* Harvey P. Dale, Jun 26 2012 *)

CROSSREFS

Sequence in context: A017435 A017567 A321815 * A133972 A233480 A233475

Adjacent sequences: A081864 A081865 A081866 * A081868 A081869 A081870

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Apr 12 2003

STATUS

approved