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A323937
Irregular triangle read by rows: Crude total numbers J(n,k) of k-6-catapolyheptagons.
1
1, 2, 1, 4, 11, 10, 3, 16, 56, 73, 42, 9, 64, 272, 460, 387, 162, 27
OFFSET
2,2
LINKS
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
KEYWORD
nonn,tabf,more
AUTHOR
N. J. A. Sloane, Feb 09 2019
STATUS
approved