id:A068904 - OEIS Search Results

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Binomial(sigma(n),tau(n)), where sigma(n) is the sum and tau(n) the number of divisors of n (A000203, A000005).

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1, 3, 6, 35, 15, 495, 28, 1365, 286, 3060, 66, 376740, 91, 10626, 10626, 169911, 153, 3262623, 190, 5245786, 35960, 58905, 276, 2558620845, 4495, 111930, 91390, 32468436, 435, 11969016345, 496, 67945521 (list; graph; listen)

	OFFSET	`1,2`
	MAPLE	`with(numtheory); P:=proc(i) local a, n; for n from 1 by 1 to i do a:=binomial(sigma(n), tau(n)); print(a); od; end: P(20); [From Paolo P. Lava (ppl(AT)spl.at), Dec 12 2008]`
	CROSSREFS	`Cf. A068905, A068903.` `Sequence in context: A124178 A101142 A134748 this_sequence A143046 A009197 A130317` `Adjacent sequences: A068901 A068902 A068903 this_sequence A068905 A068906 A068907`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 06 2002`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

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