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A166455 Triangle read by rows, twice Pascal's triangle minus Sierpinski's gasket, 2*A007318 -A047999 1

%I

%S 1,1,1,1,4,1,1,5,5,1,1,8,12,8,1,1,9,20,20,9,1,1,12,29,40,29,1,1,13,41,

%T 69,69,41,13,1,1,16,56,112,140,112,56,16,1,1,17,72,168,252,252,168,72,

%U 17,1

%N Triangle read by rows, twice Pascal's triangle minus Sierpinski's gasket, 2*A007318 -A047999

%C Row sums = A166456: (1, 2, 6, 12, 30, 60, 124,...).

%F Triangle read by rows, 2*A007318 - A047999

%e First few rows of the triangle =

%e 1;

%e 1, 1;

%e 1, 4, 1;

%e 1, 5, 5, 1;

%e 1, 8, 12, 8, 1;

%e 1, 9, 20, 20, 9, 1;

%e 1, 12, 29, 40, 29, 12, 1;

%e 1, 13, 41, 69, 69, 41, 13, 1;

%e 1, 16, 56, 112, 140, 112, 56, 16, 1;

%e 1, 17, 72, 168, 252, 252, 168, 72, 17, 1;

%e 1, 20, 89, 240, 420, 504, 420, 240, 89, 20, 1;

%e 1, 21, 109, 329, 660, 924, 924, 660, 329, 109, 21, 1;

%e 1, 24, 132, 440, 989, 1584, 1848, 1584, 989, 440, 132, 24, 1;

%e ...

%Y A047999, A166456

%K nonn,tabl

%O 0,5

%A _Gary W. Adamson_, Oct 14 2009

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Last modified July 20 11:28 EDT 2019. Contains 325180 sequences. (Running on oeis4.)