A143313 Triangle read by rows, A130540 * A000012, 1<=k<=n.

1, 4, 1, 5, 1, 1, 11, 4, 1, 1, 7, 1, 1, 1, 1, 20, 8, 4, 1, 1, 19, 1, 1, 1, 1, 1, 1, 26, 11, 4, 4, 1, 1, 1, 1, 18, 5, 5, 1, 1, 1, 1, 1, 1, 28, 10, 4, 4, 4, 1, 1, 1, 1, 1, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 55, 27, 15, 8, 4, 4, 1, 1, 1, 1, 1, 1, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1

Offset

1,2

Comments

Left border = A007429: (1, 4, 5, 11, 7, 20, 9,...).

Row sums = A060640: (1, 5, 7, 17, 11, 35,...).

Links

Table of n, a(n) for n=1..90.

Formula

Triangle read by rows, A130540 * A000012, 1<=k<=n. Equals partial row sums of A130540 starting from the right.

Example

First few rows of the triangle =
1;
4, 1;
5, 1, 1;
11, 4, 1, 1;
7, 1, 1, 1, 1;
20, 8, 4, 1, 1, 1;
9, 1, 1, 1, 1, 1, 1;
...
Row 4 = (11, 4, 1, 1) since row 4 of A130540 = (7, 3, 0, 1).

Crossrefs

Cf. A130540, A007429, A060640.

Sequence in context: A244759 A194127 A061642 * A132588 A195986 A348492

Adjacent sequences: A143310 A143311 A143312 * A143314 A143315 A143316

Keyword

nonn,tabl

Author

Gary W. Adamson, Aug 06 2008

Status

approved