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A122689 Irregular triangle read by rows giving numbers of azulenoid isomers (see Brunvoll et al. for precise definition). 0
1, 1, 3, 1, 14, 6, 2, 79, 43, 14, 3, 459, 326, 131, 37, 8, 1, 2800, 2442, 1172, 418, 108, 20, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

REFERENCES

J. Brunvoll, S. J. Cyvin and B. N. Cyvin, Azulenoids, MATCH, No. 34, 1996, 91-108.

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

Triangle begins:

1

1

3 1

14 6 2

79 43 14 3

459 326 131 37 8 1

2800 2442 1172 418 108 20 1

CROSSREFS

Sequence in context: A283285 A283374 A202039 * A283402 A283349 A204121

Adjacent sequences:  A122686 A122687 A122688 * A122690 A122691 A122692

KEYWORD

nonn,tabf

AUTHOR

N. J. A. Sloane, Sep 23 2006

STATUS

approved

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Last modified September 19 23:31 EDT 2019. Contains 327207 sequences. (Running on oeis4.)