A038751 - OEIS

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A038751

A variant of the recurrence for A001190.

0, 1, 1, 0, 1, 1, 2, 3, 6, 9, 18, 30, 60, 105, 210, 381, 765, 1425, 2868, 5454, 11004, 21210, 42930, 83673, 169851, 333843, 679602, 1345476, 2745636, 5467275, 11182365, 22379895, 45866418, 92180781, 189275955, 381831396, 785328636 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,7`
	MAPLE	`A038751 := proc(n) option remember; local s, k; if n<=1 then RETURN(n); else s := 0; if n mod 2 = 0 then s := A038751(n/2) * (A038751(n/2) + 1)/2; for k from 1 to n/2 - 1 do s := s + A038751(k) * A038751(n - k); od; RETURN(s); else for k from 1 to (n - 1)/2 - 1 do s := s + A038751(k) * A038751(n - k); od; RETURN(s); fi; fi; end;`
	CROSSREFS	`Cf. A001190, A038750.` `Sequence in context: A107847 A059966 A095718 * A018518 A091326 A113863` `Adjacent sequences: A038748 A038749 A038750 * A038752 A038753 A038754`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), May 03 2000`

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.