A202820 The left-hand half-triangle of A202704.

0, 0, 0, 1, 1, 1, 3, 2, 1, 0, 17, 20, 22, 23, 23, 105, 88, 68, 46, 23, 0

Offset

1,7

Links

Table of n, a(n) for n=1..21.

Example

Triangle begins:
0
0 0
1 1 1
3 2 1 0
17 20 22 23 23
105 88 68 46 23 0

Crossrefs

Cf. A202704, A202819.

Sequence in context: A321964 A197819 A232006 * A113081 A172184 A109865

Adjacent sequences: A202817 A202818 A202819 * A202821 A202822 A202823

Keyword

nonn,tabl,more

Author

N. J. A. Sloane, Dec 25 2011

Status

approved