Search: id:A014784
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%I A014784
%S A014784 1,1,1,2,3,2,7,12,12,7,38,69,81,69,38,295,552,702,702,552,295,3098,
%T A014784 5901,7857,8559,7857,5901,3098,42271,81444,111618,128034,128034,111618,
%U A014784 81444,42271,726734,1411197,1971945,2339631,2467665,2339631,1971945
%N A014784 Triangle of numbers associated with Genocchi numbers.
%D A014784 G. Kreweras, Sur les permutations compte'es par les nombres de Genocchi..., 
               Europ. J. Comb., vol. 18, pp. 49-58, 1997.
%t A014784 a[ 1, 1 ]=1; a[ n_, k_ ] := 0 /; (k>n || k<=0); a[ n_, 1 ]=Sum[ a[ n-1, 
               i ], {i, 1, n-1} ] a[ n_, k_ ] := a[ n, k ]=2a[ n, k-1 ]-a[ n, k-2 
               ]-a[ n-1, k-1 ]-a[ n-1, k-2 ]; Flatten[ Table[ a[ n, i ], {n, 1, 
               10}, {i, 1, n} ] ]
%Y A014784 Cf. A035003.
%Y A014784 Columns include A000366 and A102078. Row sums are in A000366.
%Y A014784 Sequence in context: A122697 A129022 A122076 this_sequence A048601 A008317 
               A139011
%Y A014784 Adjacent sequences: A014781 A014782 A014783 this_sequence A014785 A014786 
               A014787
%K A014784 tabl,nonn,easy
%O A014784 0,4
%A A014784 N. J. A. Sloane (njas(AT)research.att.com).
%E A014784 More terms from Erich Friedman (erich.friedman(AT)stetson.edu).

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