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A067819 Sum of the divisors of binomial(2n,n). 2
3, 12, 42, 144, 728, 2688, 10080, 39312, 127008, 423360, 2419200, 6773760, 32140800, 160704000, 626745600, 1940889600, 9289728000, 38397542400, 156332851200, 642477588480, 2223960883200, 8154523238400, 36280077926400 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..23.

MATHEMATICA

Table[DivisorSigma[1, Binomial[2 n, n]], {n, 30}]

CROSSREFS

Sequence in context: A084529 A017941 A066972 * A094970 A065179 A048121

Adjacent sequences:  A067816 A067817 A067818 * A067820 A067821 A067822

KEYWORD

nonn

AUTHOR

Joseph L. Pe, Feb 08 2002

STATUS

approved

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Last modified August 24 18:12 EDT 2019. Contains 326295 sequences. (Running on oeis4.)