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Search: id:A111523
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| A111523 |
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Sequence is {a(5,n)}, where a(m,n) is defined at sequence A111518. |
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+0
6
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| 1, 5, 12, 16, 12, 7, -42, -242, -183, -173, -5413, 6523, 37329, -375658, 977204, 4143218, -53311893, 210488510, 411432809, -10928034980, 66603480055, -51520031207, -2744112360076, 26933442266635, -98628074677603, -626803397046344, 12466676321155843, -88760048121704842
(list; graph; listen)
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OFFSET
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0,2
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EXAMPLE
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a(0,n): 1,0,-3,-4,7,...
a(1,n): 1,1,-2,-6,1,...
a(2,n): 1,2,0,-6,-5,...
a(3,n): 1,3,3,-3,-8,...
a(4,n): 1,4,7,4,-4,...
Main diagonal is 1,1,0,-3,-4,..., which is 1 followed by sequence a(0,n).
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MAPLE
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A111523T := proc(nmax) local a, m, n; a := array(0..nmax, 0..nmax) ; for m from 0 to nmax do a[m, 0] := 1 ; od ; for n from 1 to nmax do a[n, n] := a[0, n-1] ; for m from n+1 to nmax do a[m, n] := a[m-1, n]+a[m, n-1] ; od ; for m from n-1 to 0 by -1 do a[m, n] := a[m+1, n]-a[m+1, n-1] ; od ; od ; RETURN(a) ; end: nmax := 50 ; a := A111523T(nmax) ; m := 5 ; for n from 0 to nmax do printf("%d, ", a[m, n]) ; od; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 26 2006
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CROSSREFS
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Cf. A111518, A111519, A111520, A111521, A111522.
Sequence in context: A087090 A056713 A110670 this_sequence A078231 A008467 A076718
Adjacent sequences: A111520 A111521 A111522 this_sequence A111524 A111525 A111526
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KEYWORD
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easy,sign
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AUTHOR
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Leroy Quet (qq-quet(AT)mindspring.com), Aug 05 2005
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 26 2006
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