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A089940
Triangle read by rows: T(n,k)=binomial(n+k,floor((n-k)/2))
6
1, 1, 1, 2, 1, 1, 3, 4, 1, 1, 6, 5, 6, 1, 1, 10, 15, 7, 8, 1, 1, 20, 21, 28, 9, 10, 1, 1, 35, 56, 36, 45, 11, 12, 1, 1, 70, 84, 120, 55, 66, 13, 14, 1, 1, 126, 210, 165, 220, 78, 91, 15, 16, 1, 1, 252, 330, 495, 286, 364, 105, 120, 17, 18, 1, 1, 462, 792, 715, 1001, 455, 560, 136, 153
OFFSET
0,4
CROSSREFS
Columns include A001405, A037955, A037956, A037957. Row sums are A089941.
Sequence in context: A210341 A160449 A326322 * A331598 A123974 A238350
KEYWORD
easy,nonn,tabl
AUTHOR
Paul Barry, Nov 16 2003
STATUS
approved