A046697 Number of catacondensed simply-connected monopentapolyhexes (catafusenes).

1, 1, 3, 9, 35, 137, 574, 2431, 10534, 46123, 204343, 912967, 4111375, 18637303, 84988775, 389589095, 1794280695, 8298536715, 38527147681, 179487103411, 838820394913, 3931498654243, 18475619837816, 87036536948489, 410947150379120, 1944378509186237

Offset

1,3

Links

Table of n, a(n) for n=1..26.

S. J. Cyvin et al., Graph-theoretical studies on fluoranthenoids and fluorenoids:enumeration of some catacondensed systems, J. Molec. Struct. (Theochem), 285 (1993), 179-185.

Formula

a(n) = A038392(n) + A044046(n).

Crossrefs

Cf. A024311, A038392, A044046.

Sequence in context: A149018 A149019 A102865 * A151045 A369389 A225041

Adjacent sequences: A046694 A046695 A046696 * A046698 A046699 A046700

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Sean A. Irvine, Apr 16 2021

Status

approved