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 A060539 Table by antidiagonals of number of ways of choosing k items from n*k. 9
 1, 1, 2, 1, 6, 3, 1, 20, 15, 4, 1, 70, 84, 28, 5, 1, 252, 495, 220, 45, 6, 1, 924, 3003, 1820, 455, 66, 7, 1, 3432, 18564, 15504, 4845, 816, 91, 8, 1, 12870, 116280, 134596, 53130, 10626, 1330, 120, 9, 1, 48620, 735471, 1184040, 593775, 142506, 20475, 2024, 153, 10 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Seiichi Manyama, Antidiagonals n = 1..140, flattened (first 20 antidiagonals from Harry J. Smith) H. J. Brothers, Pascal's Prism: Supplementary Material. FORMULA a(n) = binomial(n*k, k) = A007318(n*k, k) = A060538(n, k)/A060538(n-1, k). PROG (PARI) { i=0; for (m=1, 20, for (n=1, m, k=m - n + 1; write("b060539.txt", i++, " ", binomial(n*k, k))); ) } \\ Harry J. Smith, Jul 06 2009 CROSSREFS Rows include A000012, A000984, A005809, A005810, A001449, A004355, A004368. Columns include A000027, A000384, A006566, A060541. Main diagonal is A014062. Sequence in context: A092392 A128741 A175757 * A163269 A103905 A270967 Adjacent sequences:  A060536 A060537 A060538 * A060540 A060541 A060542 KEYWORD nonn,tabl AUTHOR Henry Bottomley, Apr 02 2001 STATUS approved

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Last modified February 17 02:22 EST 2020. Contains 331976 sequences. (Running on oeis4.)