A154948 revision #6
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A154948
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Riordan array ((1+x)/(1-x^2)^2, x(1+x)/(1-x)).
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4
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1, 1, 1, 2, 3, 1, 2, 6, 5, 1, 3, 10, 14, 7, 1, 3, 15, 30, 26, 9, 1, 4, 21, 55, 70, 42, 11, 1, 4, 28, 91, 155, 138, 62, 13, 1, 5, 36, 140, 301, 363, 242, 86, 15, 1, 5, 45, 204, 532, 819, 743, 390, 114, 17, 1, 6, 55, 285, 876, 1652, 1925, 1375, 590, 146, 19, 1
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OFFSET
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0,4
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COMMENTS
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LINKS
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FORMULA
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Number triangle T(n,k) = Sum_{j=0..n+1} C(n+1-j,k+1)*C(k-1,j).
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EXAMPLE
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Triangle begins
1,
1, 1,
2, 3, 1,
2, 6, 5, 1,
3, 10, 14, 7, 1,
3, 15, 30, 26, 9, 1,
4, 21, 55, 70, 42, 11, 1
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CROSSREFS
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KEYWORD
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AUTHOR
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EXTENSIONS
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STATUS
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proposed
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