A118025 - OEIS

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A118025

Column 0 of triangle A118024; also, column 0 of the matrix square of A118024 equals this sequence shifted 1 place left.

1, 1, 2, 6, 28, 216, 2864, 66656, 2760896, 205824384, 27886535424, 6924055315968, 3173107641551872, 2700294145104025600, 4289542333320782426112, 12777557344991526923034624, 71652489091220599890081005568 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	FORMULA	`a(n) = Sum_{k=0..n-1} 2^(k(n-1-k))a(k)*a(n-1-k) for n>0 with a(0)=1.`
	CROSSREFS	`Cf. A118024.` `Sequence in context: A125812 A093657 A006117 * A119966 A002047 A126340` `Adjacent sequences: A118022 A118023 A118024 * A118026 A118027 A118028`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Apr 10 2006`

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.