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A038750 A variant of the recurrence for A001190. 2
0, 1, 1, 1, 2, 2, 5, 7, 17, 29, 66, 126, 284, 568, 1281, 2662, 6017, 12756, 28992, 62621, 142801, 312129, 714760, 1578706, 3626762, 8074580, 18606900, 41716797, 96374235, 217271226, 503159109, 1139963936, 2645397326, 6018491701 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..33.

MAPLE

A038750 := proc(n) option remember; local s, k; if n<=1 then RETURN(n); elif n <=3 then RETURN(1); else s := 0; if n mod 2 = 0 then s := A038750(n/2)*(A038750(n/2)+1)/2; for k from 1 to n/2-1 do s := s+A038750(k)*A038750(n-k); od; RETURN(s); else for k from 1 to (n-1)/2-1 do s := s+A038750(k)*A038750(n-k); od; RETURN(s); fi; fi; end;

CROSSREFS

Cf. A001190, A038751.

Sequence in context: A145344 A034438 A079280 * A300439 A208818 A221835

Adjacent sequences:  A038747 A038748 A038749 * A038751 A038752 A038753

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 03 2000

STATUS

approved

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Last modified October 23 17:31 EDT 2019. Contains 328373 sequences. (Running on oeis4.)