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Mirror image of the triangle A026794.
0

%I #15 Jan 21 2019 12:20:49

%S 1,1,1,1,0,2,1,0,1,3,1,0,0,1,5,1,0,0,1,2,7,1,0,0,0,1,2,11,1,0,0,0,1,1,

%T 4,15,1,0,0,0,0,1,2,4,22,1,0,0,0,0,1,1,2,7,30,1,0,0,0,0,0,1,1,3,8,42,

%U 1,0,0,0,0,0,1,1,2,4,12,56,1,0,0,0,0,0,0,1,1,2,5,14,77,1,0,0,0,0,0,0,1,1,1,3

%N Mirror image of the triangle A026794.

%e Triangle begins:

%e 1;

%e 1, 1;

%e 1, 0, 2;

%e 1, 0, 1, 3;

%e 1, 0, 0, 1, 5;

%e 1, 0, 0, 1, 2, 7;

%e 1, 0, 0, 0, 1, 2, 11;

%e 1, 0, 0, 0, 1, 1, 4, 15;

%e 1, 0, 0, 0, 0, 1, 2, 4, 22;

%e 1, 0, 0, 0, 0, 1, 1, 2, 7, 30;

%e 1, 0, 0, 0, 0, 0, 1, 1, 3, 8, 42;

%e 1, 0, 0, 0, 0, 0, 1, 1, 2, 4, 12, 56;

%e 1, 0, 0, 0, 0, 0, 0, 1, 1, 2, 5, 14, 77;

%e 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 3, 6, 21, 101;

%e 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 9, 24, 135;

%e ...

%Y Leading diagonal gives A000041.

%Y Second diagonal gives A002865.

%Y Row sums give A000041, n >= 1.

%Y Columns 1-4: A000012, A000007, A033322, A278105.

%Y Cf. A026794.

%K nonn,tabl

%O 1,6

%A _Omar E. Pol_, May 05 2018