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A035003
Sorted entries in triangle in A014784.
1
1, 2, 3, 7, 12, 38, 69, 81, 295, 552, 702, 3098, 5901, 7857, 8559, 42271, 81444, 111618, 128034, 726734, 1411197, 1971945, 2339631, 2467665, 15366679, 30006624, 42508638, 51627510, 56434806, 391888514, 768410349, 1099558881
OFFSET
0,2
MATHEMATICA
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 ]; Union[ Flatten[ Table[ a[ n, i ], {n, 1, 20}, {i, 1, n} ] ] ]
CROSSREFS
Cf. A014784.
Sequence in context: A056355 A056356 A084708 * A143879 A056293 A275311
KEYWORD
easy,nonn
STATUS
approved