A143445 Triangle read by rows, A051731 * (A001318 * 0^(n-k)); 1<=k<=n.

1, 1, 2, 1, 0, 5, 1, 2, 0, 7, 1, 0, 0, 0, 12, 1, 2, 5, 0, 0, 15, 1, 0, 0, 0, 0, 0, 22, 1, 2, 0, 7, 0, 0, 0, 26, 1, 0, 5, 0, 0, 0, 0, 0, 35, 1, 2, 0, 0, 12, 0, 0, 0, 0, 40, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 51, 1, 2, 5, 7, 0, 15, 0, 0, 0, 0, 0, 57

Offset

1,3

Comments

Row sums = A079248: (1, 3, 6, 10, 13, 23,...)

Links

Table of n, a(n) for n=1..78.

Formula

Triangle read by rows, A051731 * (A001318 * 0^(n-k)); 1<=k<=n. A051731 = the inverse Mobius transform and (A001318 * 0^(n-k)) = an infinite lower triangular matrix with A001318 (1, 2, 5, 7, 12, 15, 22,...) in the main diagonal and the rest zeros.

Example

First few rows of the triangle =
1;
1, 2;
1, 0, 5;
1, 2, 0, 7;
1, 0, 0, 0, 12;
1, 2, 5, 0, 0, 15;
...

Crossrefs

Cf. A051731, A001318, A079248.

Sequence in context: A060137 A350262 A243821 * A133727 A103185 A130513

Adjacent sequences: A143442 A143443 A143444 * A143446 A143447 A143448

Keyword

nonn,tabl

Author

Gary W. Adamson, Aug 15 2008

Status

approved