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 A113955 Riordan array (1/((1-4x)c(x)),xc(x)/sqrt(1-4x)), c(x) the g.f. of A000108. 2
 1, 3, 1, 11, 6, 1, 42, 30, 9, 1, 163, 140, 58, 12, 1, 638, 630, 325, 95, 15, 1, 2510, 2772, 1686, 624, 141, 18, 1, 9908, 12012, 8330, 3682, 1064, 196, 21, 1, 39203, 51480, 39796, 20264, 7050, 1672, 260, 24, 1, 155382, 218790, 185517, 106203, 42849, 12303, 2475 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Columns include A032443,A002457,A018218,A038836. Row sums are A100192. Diagonal sums are A113956. LINKS FORMULA Riordan array ((1/(1-4x)+1/sqrt(1-4x))/2, (2x/((1-4x)+sqrt(1-4x)))); Number triangle T(n, k)=sum{j=0..n, C(j, j-k)C(2n, n-j)}. T(n,k)=sum{j=0..n, C(2n,j)C(n-j,k)}; - Paul Barry, Apr 03 2006 EXAMPLE Triangle begins 1; 3, 1; 11, 6, 1; 42, 30, 9, 1; 163, 140, 58, 12, 1; 638, 630, 325, 95, 15, 1; CROSSREFS Sequence in context: A027446 A027516 A092808 * A110165 A111965 A110440 Adjacent sequences:  A113952 A113953 A113954 * A113956 A113957 A113958 KEYWORD easy,nonn,tabl AUTHOR Paul Barry, Nov 09 2005 STATUS approved

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Last modified October 16 11:27 EDT 2019. Contains 328056 sequences. (Running on oeis4.)