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A134634 Triangle formed by Pascal's rule with borders = A000108. 2

%I #12 Feb 11 2024 06:59:18

%S 1,1,1,2,2,2,5,4,4,5,14,9,8,9,14,42,23,17,17,23,42,132,65,40,34,40,65,

%T 132,429,197,105,74,74,105,197,429,1430,626,302,179,148,179,302,626,

%U 1430,4862,2056,928,481,327,327,481,928,2056,4862,16796,6918,2984,1409,808,654,808,1409,2984,6918,16796,58786,23714,9902,4393,2217,1462,1462,2217,4393,9902,23714,58786

%N Triangle formed by Pascal's rule with borders = A000108.

%C Row sums = A134635: (1, 2, 6, 18, 54, 164, ...).

%F Triangle, given right and left borders consist of the Catalan sequence, A000108; then T(n,k) = T(n-1,k) + T(n-1,k-1).

%e First few rows of the triangle:

%e 1;

%e 1, 1;

%e 2, 2, 2;

%e 5, 4, 4, 5;

%e 14, 9, 8, 9, 14;

%e 42, 23, 17, 17, 23, 42;

%e 132, 65, 40, 34, 40, 65, 132;

%e ...

%Y Cf. A000108, A134635, A222403, A222404, A222405.

%K nonn,tabl

%O 0,4

%A _Gary W. Adamson_, Nov 04 2007

%E Recomputed by _N. J. A. Sloane_, Feb 18 2013

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Last modified September 15 15:59 EDT 2024. Contains 375938 sequences. (Running on oeis4.)