A157501 Triangle read by rows, A157498 * A000012

1, 2, 2, 3, 3, 3, 6, 6, 4, 4, 5, 5, 5, 5, 5, 16, 16, 12, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 24, 24, 20, 20, 8, 8, 8, 8, 24, 24, 24, 9, 9, 9, 9, 9, 9, 38, 38, 30, 30, 30, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11

Offset

1,2

Links

Table of n, a(n) for n=1..66.

Formula

Triangle read by rows, A157498 * A000012 = partial sums of A157498 terms by rows, starting from the right.

Example

First few rows of the triangle =
1;
2, 2;
3, 3, 3;
6, 6, 4, 4;
5, 5, 5, 5, 5;
16, 16, 12, 6, 6, 6;
7, 7, 7, 7, 7, 7, 7;
24, 24, 20, 20, 8, 8, 8, 8;
24, 24, 24, 9, 9, 9, 9, 9, 9;
38, 38, 30, 30, 30, 10, 10, 10, 10, 10;
11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11;
103, 103, 99, 78, 42, 42, 12, 12, 12, 12, 12, 12;
13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13;
68, 68, 56, 56, 56, 56, 56, 14, 14, 14, 14, 14, 14, 14;
...

Crossrefs

Cf. A157498, A157500

Sequence in context: A307730 A169618 A175454 * A080968 A115733 A025496

Adjacent sequences: A157498 A157499 A157500 * A157502 A157503 A157504

Keyword

nonn,tabl

Author

Gary W. Adamson & Mats Granvik, Mar 01 2009

Status

approved