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 A080382 Triangle read by rows: C[n,Floor[n/2]]/GCD[C[n,Floor[n/2]],C[n,i], i=0,...n; central binomial coefficient is divided by greatest common divisor of binomial coefficients and corresponding central binomial coefficient. 0
 1, 1, 1, 2, 1, 2, 3, 1, 1, 3, 6, 3, 1, 3, 6, 10, 2, 1, 1, 2, 10, 20, 10, 4, 1, 4, 10, 20, 35, 5, 5, 1, 1, 5, 5, 35, 70, 35, 5, 5, 1, 5, 5, 35, 70, 126, 14, 7, 3, 1, 1, 3, 7, 14, 126, 252, 126, 28, 21, 6, 1, 6, 21, 28, 126, 252, 462, 42, 42, 14, 7, 1, 1, 7, 14, 42, 42, 462, 924, 77, 14, 21, 28 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 LINKS EXAMPLE Triangle begins: 1 1 1 2 1 2 3 1 1 3 6 3 1 3 6 10 2 1 1 2 10 20 10 4 1 4 10 20 35 5 5 1 1 5 5 35 MATHEMATICA Table[Table[Binomial[n, Floor[n/2]]/GCD[Binomial[n, j], Binomial[n, Floor[n/2]]], {j, 0, n}], {n, 1, 10}] CROSSREFS Cf. A007318, A001405, A080381. Sequence in context: A109004 A103823 A136642 * A106394 A171712 A091412 Adjacent sequences:  A080379 A080380 A080381 * A080383 A080384 A080385 KEYWORD nonn,tabl AUTHOR Labos Elemer, Mar 12 2003 STATUS approved

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