A109225 - OEIS

A109225

Triangle read by rows: T(n,0) = T(n,n) = 1 and for 0 < k < n: T(n,k) = T(n-1,k-1) + 1 - T(n-1,k-1) mod 2 + T(n-1,k).

1, 1, 1, 1, 2, 1, 1, 3, 4, 1, 1, 4, 7, 6, 1, 1, 5, 12, 13, 8, 1, 1, 6, 17, 26, 21, 10, 1, 1, 7, 24, 43, 48, 31, 12, 1, 1, 8, 31, 68, 91, 80, 43, 14, 1, 1, 9, 40, 99, 160, 171, 124, 57, 16, 1, 1, 10, 49, 140, 259, 332, 295, 182, 73, 18, 1, 1, 11, 60, 189, 400, 591, 628, 477

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OFFSET

1,5

COMMENTS

Row sums give A084172, the generalized Jacobsthal numbers;

T(n,1) = n for n>0;

T(n,2) = A074148(n) for n>1.

LINKS

Table of n, a(n) for n=1..74.

Index entries for triangles and arrays related to Pascal's triangle

CROSSREFS

Cf. A007318.