id:A026599 - OEIS Search Results

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a(n) = Sum{T(i,j)}, 0<=j<=i, 0<=i<=2n, T given by A026584.

+0
3

1, 3, 9, 23, 61, 155, 401, 1023, 2629, 6723, 17241, 44135, 113101, 289643, 742049, 1900623, 4868821, 12471315, 31946601, 81831863, 209618269, 536945723, 1375418801, 3523201695, 9024876901, 23117683683, 59217191289, 151687926023 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.: (1+x)/[(1-x)(1-x-4x^2)] (conjectured). - Ralf Stephan, Feb 04 2004`
	CROSSREFS	`Cf. A006131, A026581.` `Sequence in context: A077847 A027058 A146818 this_sequence A061647 A077996 A029852` `Adjacent sequences: A026596 A026597 A026598 this_sequence A026600 A026601 A026602`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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