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Search: id:A131267
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| A131267 |
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Self-generated: 1=1*1; 2=1*1+1*1; 5=1*2+2*1+1*1; 12=1*5+2*2+2*1+1*1; 35=1*12+2*5+5*2+2*1+1*1; 97=1*35+2*12+5*5+5*2+2*1+1*1; ... |
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+0
1
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| 1, 2, 5, 12, 35, 97, 300, 886, 2884, 9038, 30119, 97044, 330178, 1093187, 3760857, 12642484, 44030988, 150422819, 527900140, 1820782288, 6438077940, 22426049665, 79685359338, 279367999565, 997882736275, 3522643337418
(list; graph; listen)
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OFFSET
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0,2
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MAPLE
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A131267 := proc(n) option remember ; local a, i ; if n <=0 then RETURN(1) ; else a :=0 ; for i from 0 to n do a := a+ A131267( min(i, n-i))*A131267(n-i-1) ; od: RETURN(a) ; fi ; end: seq(A131267(n), n=0..30) ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 25 2007
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CROSSREFS
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Sequence in context: A131467 A000103 A101292 this_sequence A075202 A075203 A075205
Adjacent sequences: A131264 A131265 A131266 this_sequence A131268 A131269 A131270
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KEYWORD
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nonn
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Sep 28 2007
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 25 2007
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