A202820 - OEIS

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A202820

The left-hand half-triangle of A202704.

1

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

(list; table; graph; refs; listen; history; text; internal format)

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