id:A026565 - OEIS Search Results

Search: id:A026565

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a(n) = T(n,0) + T(n,1) + ... T(n,2n), T given by A026552.

+0
3

1, 3, 9, 18, 54, 108, 324, 648, 1944, 3888, 11664, 23328, 69984, 139968, 419904, 839808, 2519424, 5038848, 15116544, 30233088, 90699264, 181398528, 544195584, 1088391168, 3265173504, 6530347008, 19591041024, 39182082048 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.: (1+3x+3x^2)/(1-6x^2). - Ralf Stephan, Feb 03 2004`
	CROSSREFS	`Cf. A026532, A026534, A026551, A026567.` `Sequence in context: A015656 A056372 A101652 this_sequence A133136 A067864 A097267` `Adjacent sequences: A026562 A026563 A026564 this_sequence A026566 A026567 A026568`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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