A131763 - OEIS

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A131763

Series reversion of x(1-4x)/(1-x) .

1, 3, 21, 183, 1785, 18651, 204141, 2310447, 26819121, 317530227, 3819724293, 46553474919, 573608632233, 7133530172619, 89423593269213, 1128765846337887, 14334721079385441, 183021615646831587 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`The Hankel transform of this sequence is 12^C(n+1,2) .`
	FORMULA	`a(n) = Sum_{k, 0<=k<=n}A086810(n,k)3^k .` `a(n)=(3/4)A103211(n) for n>0 .`
	CROSSREFS	`Sequence in context: A195105 A192946 A054879 * A006199 A083063 A012163` `Adjacent sequences: A131760 A131761 A131762 * A131764 A131765 A131766`
	KEYWORD	`nonn`
	AUTHOR	`Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Oct 29 2007, Nov 06 2007`
	EXTENSIONS	`a(17) corrected by Mark van Hoeij (hoeij(AT)math.fsu.edu), Jul 01 2010`

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Last modified February 16 09:50 EST 2012. Contains 205904 sequences.