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A085853 Triangle T(n, k) read by rows; given by [1, 1, 1, 1, 1, 1, 1, 1, ...] DELTA [1, 0, 2, 0, 2, 0, 3, 0, 2, 0, 4, 0, 2, 0, ...] (A000005 interspersed with 0's) where DELTA is Deléham's operator defined in A084938. 1

%I #11 Aug 08 2015 11:04:19

%S 1,1,1,2,3,1,5,11,7,1,14,42,42,15,1,42,162,227,137,31,1,132,627,1145,

%T 996,408,63,1,429,2432,5516,6345,3849,1143,127,1,1430,9453,25752,

%U 37141,30238,13634,3062,255,1,4862,36821,117581,205138,211512

%N Triangle T(n, k) read by rows; given by [1, 1, 1, 1, 1, 1, 1, 1, ...] DELTA [1, 0, 2, 0, 2, 0, 3, 0, 2, 0, 4, 0, 2, 0, ...] (A000005 interspersed with 0's) where DELTA is Deléham's operator defined in A084938.

%H Alois P. Heinz, <a href="/A085853/b085853.txt">Rows n = 0..140, flattened</a>

%F T(n,0)= A000108(n), Catalan numbers .

%e Triangle begins :

%e 1;

%e 1, 1;

%e 2, 3, 1;

%e 5, 11, 7, 1;

%e 14, 42, 42, 15, 1; ...

%Y Cf. A000005, A000012, A000108, A000225 (first subdiagonal).

%K nonn,tabl

%O 0,4

%A _N. J. A. Sloane_, Aug 16 2003

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)