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A102427
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Triangle based on downward diagonals of A102426.
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3
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1, 1, 1, 1, 3, 2, 1, 5, 4, 1, 1, 7, 6, 6, 3, 1, 9, 8, 15, 10, 1, 1, 11, 10, 28, 21, 10, 4, 1, 13, 12, 45, 36, 35, 20, 1, 1, 15, 14, 66, 55, 84, 56, 15, 5, 1, 17, 16, 91, 78, 165, 120, 70, 35, 1, 1, 19, 18, 120, 105, 286, 220, 210, 126, 21, 6
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,5
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FORMULA
| T(n, k)=if(k<=n, binomial(floor((2n-k+2)/2)+n-k, floor((2n-k+1)/2)-n+k), 0) - Paul Barry (pbarry(AT)wit.ie), Jun 22 2005
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CROSSREFS
| Cf. A011973, A102426, A102428, A102429.
Sequence in context: A113977 A183162 A019587 * A080883 A021315 A068389
Adjacent sequences: A102424 A102425 A102426 * A102428 A102429 A102430
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KEYWORD
| easy,nonn,tabl
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AUTHOR
| Russell Walsmith (russw(AT)lycos.com), Jan 11 2005
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EXTENSIONS
| Corrected and extended by Paul Barry (pbarry(AT)wit.ie), Jun 22 2005
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