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A102427 Triangle based on downward diagonals of A102426. 3
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; text; internal format)
OFFSET
0,5
LINKS
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, Jun 22 2005
CROSSREFS
Sequence in context: A183162 A309219 A019587 * A080883 A021315 A337315
KEYWORD
easy,nonn,tabl
AUTHOR
Russell Walsmith, Jan 11 2005
EXTENSIONS
Corrected and extended by Paul Barry, Jun 22 2005
STATUS
approved

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Last modified March 18 22:47 EDT 2024. Contains 370951 sequences. (Running on oeis4.)