

A044048


Catafusenes (see reference for precise definition).


1



1, 1, 3, 10, 37, 149, 630, 2713, 11899, 52789, 236345, 1066317, 4842531, 22117897, 101535659, 468233674, 2168094625, 10076216851, 46986691678, 219777820957, 1030892924479, 4848040645676, 22853639788127, 107970205586283
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

0,3


REFERENCES

S. J. Cyvin et al., Enumeration and classification of certain polygonal systems...: annelated catafusenes, J. Chem. Inform. Comput. Sci., 34 (1994), 11741180.


LINKS



FORMULA

G.f.: (6  18x^3  (1x)*(12x)*f(x)  3*(1+2x)*f(x^2)  2*f(x^3))/(12x^3), where f(x) = sqrt(1  6x + 5x^2) (follows from eq. (26) in Cyvin et al.).


CROSSREFS



KEYWORD

nonn


AUTHOR



EXTENSIONS



STATUS

approved



