A130210 Triangle read by rows: matrix product A051731 * A130209.

1, 1, 2, 1, 0, 2, 1, 2, 0, 3, 1, 0, 0, 0, 2, 1, 2, 2, 0, 0, 4, 1, 0, 0, 0, 0, 0, 2, 1, 2, 0, 3, 0, 0, 0, 4, 1, 0, 2, 0, 0, 0, 0, 0, 3, 1, 2, 0, 0, 2, 0, 0, 0, 0, 4, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 2, 2, 3, 0, 4, 0, 0, 0, 0, 0, 6, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 2

Offset

1,3

Links

Table of n, a(n) for n=1..93.

Formula

Inverse Moebius transform of A130209.

T(n,n) = A000005(n).

Example

First few rows of the triangle are:
1;
1, 2;
1, 0, 2;
1, 2, 0, 3;
1, 0, 0, 0, 2;
1, 2, 2, 0, 0, 4;
1, 0, 0, 0, 0, 0, 2;
...

Maple

A130210 := proc(n, k)
    add( A051731(n, j)*A130209(j, k), j=k..n) ;
end proc:
seq(seq(A130210(n, k), k=1..n), n=1..15) ;  # R. J. Mathar, Aug 06 2016

Crossrefs

Cf. A000005, A007425 (row sums).

Sequence in context: A230025 A330374 A207869 * A236459 A190427 A287108

Adjacent sequences: A130207 A130208 A130209 * A130211 A130212 A130213

Keyword

nonn,tabl,easy

Author

Gary W. Adamson, May 17 2007

Status

approved