id:A037293 - OEIS Search Results

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Sum_{i=0}^{2^{n-1}} (2^{n-1} choose i)^2.

+0
3

1, 2, 6, 70, 12870, 601080390, 1832624140942590534, 23951146041928082866135587776380551750, 5768658823449206338089748357862286887740211701975162032608436567264518750790 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`Central binomial coefficients for powers of 2: a(n)=A001405[A000079(n)] - Labos E. (labos(AT)ana.sote.hu), Apr 11 2001`
	CROSSREFS	`Cf. A001405, A000079.` `Sequence in context: A156458 A136268 A030242 this_sequence A129785 A000896 A103527` `Adjacent sequences: A037290 A037291 A037292 this_sequence A037294 A037295 A037296`
	KEYWORD	`nonn,easy`
	AUTHOR	`John Tromp (tromp(AT)cwi.nl).`
	EXTENSIONS	`More terms from Erich Friedman (erich.friedman(AT)stetson.edu).`

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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.

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