A026740 - OEIS

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A026740

2^n*(2^n-1)*(2^n-2)/6.

0, 0, 4, 56, 560, 4960, 41664, 341376, 2763520, 22238720, 178433024, 1429559296, 11444858880, 91592417280, 732873539584, 5863525154816, 46910348656640, 375291379056640, 3002365391929344, 24019060573863936, 192153034345676800 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	LINKS	`Vincenzo Librandi, Table of n, a(n) for n = 0..300`
	FORMULA	`a(n) = binomial(2^n, 3)`
	MAPLE	`seq(binomial(2^n, 3), n=0..20); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 22 2008`
	PROG	`(MAGMA) [2^n(2^n-1)(2^n-2)/6: n in [0..30] ]; // Vincenzo Librandi, May 23 2011`
	CROSSREFS	`Sequence in context: A077122 A020540 A101540 * A191466 A130219 A111874` `Adjacent sequences: A026737 A026738 A026739 * A026741 A026742 A026743`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 17 13:28 EST 2012. Contains 206031 sequences.