A323937 Irregular triangle read by rows: Crude total numbers J(n,k) of k-6-catapolyheptagons.

1, 2, 1, 4, 11, 10, 3, 16, 56, 73, 42, 9, 64, 272, 460, 387, 162, 27

Offset

2,2

Links

Table of n, a(n) for n=2..19.

S. J. Cyvin, J. Brunvoll, and B. N. Cyvin, Enumeration of unbranched catacondensed polygonal systems: general solution for two kinds of polygons, Journal of Chemical Information and Computer Sciences, 37 (1997), 460-466. See Table 1.

Example

Triangle begins:
1, 2, 1,
4, 11, 10, 3,
16, 56, 73, 42, 9,
64, 272, 460, 387, 162, 27,
...

Crossrefs

Cf. A323938.

Sequence in context: A016544 A134028 A111479 * A088137 A205870 A371062

Adjacent sequences: A323934 A323935 A323936 * A323938 A323939 A323940

Keyword

nonn,tabf,more

Author

N. J. A. Sloane, Feb 09 2019

Status

approved