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A107310 Triangle read by rows, related to enumeration of polycyclic conjugated hydrocarbons (see Brunvoll reference for precise definition). 0
1, 1, 1, 1, 2, 1, 5, 11, 7, 1, 25, 60, 46, 12, 1, 125, 325, 290, 106, 17, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,5

REFERENCES

J. Brunvoll, S. J. Cyvin and B. N. Cyvin, Isomer enumeration of polygonal systems..., J. Molec. Struct. (Theochem), 364 (1996), 1-13.

LINKS

Table of n, a(n) for n=0..20.

EXAMPLE

Triangle begins:

1

1 1

1 2 1

5 11 7 1

25 60 46 12 1

CROSSREFS

Sequence in context: A222574 A222680 A110352 * A277279 A049950 A095216

Adjacent sequences:  A107307 A107308 A107309 * A107311 A107312 A107313

KEYWORD

nonn,tabl

AUTHOR

N. J. A. Sloane, Aug 18 2006

STATUS

approved

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Last modified June 25 12:01 EDT 2019. Contains 324352 sequences. (Running on oeis4.)