id:A131681 - OEIS Search Results

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Phi(binomial(2*n,n)*n^2) (phi of A002736 = Apery numbers: n^2 C(2n,n). ).

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0, 1, 8, 48, 384, 1440, 8640, 40320, 184320, 829440, 5529600, 18247680, 87588864, 474439680, 1532805120, 7664025600, 32699842560, 130288435200, 517321728000, 2184247296000, 9196830720000, 38626689024000, 188841590784000 (list; graph; listen)

	OFFSET	`0,3`
	MAPLE	`with(numtheory):with(combinat):a:=n->phi(binomial(2n, n)n^2): seq(a(n), n=0..25);`
	CROSSREFS	`Cf. A002736.` `Sequence in context: A037690 A095897 A025013 this_sequence A077708 A013186 A072169` `Adjacent sequences: A131678 A131679 A131680 this_sequence A131682 A131683 A131684`
	KEYWORD	`nonn`
	AUTHOR	`Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Oct 07 2007`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research