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Search: id:A093543
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| A093543 |
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Main diagonal of square array A093541, in which column (k+1) equals the self-convolution of row k. |
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+0
3
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| 1, 2, 12, 138, 2888, 110856, 7930308, 1066762914, 269503442664, 127145506540264, 111423795046477280
(list; graph; listen)
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OFFSET
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0,2
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PROGRAM
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(PARI) T(n, k)=if(n<0|k<0, 0, if(n==0|k==0, 1, sum(i=0, n, T(k-1, i)*T(k-1, n-i)))); a(n)=T(n, n)
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CROSSREFS
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Cf. A093541, A093542.
Sequence in context: A108996 A117513 A119819 this_sequence A091144 A087800 A009747
Adjacent sequences: A093540 A093541 A093542 this_sequence A093544 A093545 A093546
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KEYWORD
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nonn
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AUTHOR
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Paul D. Hanna (pauldhanna(AT)juno.com), Mar 30 2004
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