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A078504 Binomial(sigma(n+1), sigma(n)). 0
3, 4, 35, 0, 924, 0, 6435, 0, 8568, 0, 30421755, 0, 1961256, 1, 2629575, 0, 62359143990, 0, 513791607420, 0, 58905, 0, 36052387482172425, 0, 4280561376, 0, 41648951840265, 0, 164307576757973059488, 0, 916312070471295267, 0, 25827165 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..33.

MATHEMATICA

Table[Binomial[DivisorSigma[1, i + 1], DivisorSigma[1, i]], {i, 1, 50}]

CROSSREFS

Sequence in context: A032834 A025140 A246015 * A066090 A251259 A042891

Adjacent sequences:  A078501 A078502 A078503 * A078505 A078506 A078507

KEYWORD

nonn

AUTHOR

Joseph L. Pe, Jan 05 2003

STATUS

approved

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Last modified April 20 17:54 EDT 2019. Contains 322310 sequences. (Running on oeis4.)