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 A089940 Triangle read by rows: T(n,k)=binomial(n+k,floor((n-k)/2)) 1
 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 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS CROSSREFS Columns include A001405, A037955, A037956, A037957. Row sums are A089941. Sequence in context: A210341 A160449 A326322 * A331598 A123974 A238350 Adjacent sequences:  A089937 A089938 A089939 * A089941 A089942 A089943 KEYWORD easy,nonn,tabl AUTHOR Paul Barry, Nov 16 2003 STATUS approved

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Last modified December 4 06:49 EST 2021. Contains 349476 sequences. (Running on oeis4.)