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A046697 Number of catacondensed simply-connected monopentapolyhexes (catafusenes). 1
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 (list; graph; refs; listen; history; text; internal format)
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 A225041 A335642

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

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Last modified June 15 00:00 EDT 2021. Contains 345041 sequences. (Running on oeis4.)