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A113362
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Column 2 of triangle A113360, also equals column 1 of A113340^5.
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4
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1, 15, 210, 3285, 59395, 1241270, 29720808, 806720492, 24568601477, 831697990069, 31036137984664, 1267376997249262, 56270606942915489, 2701018385881136958, 139463341982980040911, 7711492696761363573725
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OFFSET
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0,2
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COMMENTS
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A113360 equals the matrix cube of triangle A113340, where column 2 of A113340^3 = column 1 of A113340^5.
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LINKS
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Table of n, a(n) for n=0..15.
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PROG
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(PARI) a(n)=local(A, B); A=matrix(1, 1); A[1, 1]=1; for(m=2, n+3, B=matrix(m, m); for(i=1, m, for(j=1, i, if(i<3 || j==i || j>m-1, B[i, j]=1, if(j==1, B[i, 1]=1, B[i, j]=(A^(2*j-1))[i-j+1, 1])); )); A=B); (A^3)[n+3, 3]
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CROSSREFS
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Cf. A113340, A113350, A113360 (A113340^3), A113341 (column 0), A113361 (column 1), A113363 (column 3), A113364 (column 4).
Sequence in context: A186231 A001880 A240682 * A252875 A135519 A179091
Adjacent sequences: A113359 A113360 A113361 * A113363 A113364 A113365
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KEYWORD
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nonn
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AUTHOR
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Paul D. Hanna, Nov 08 2005
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STATUS
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approved
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