A120651 Triangle read by rows: numbers of isomers of unbranched a-4-catapolydecagons.

1, 1, 1, 1, 1, 1, 4, 5, 5, 1, 16, 29, 25, 5, 1, 100, 213, 183, 54, 9, 1, 625, 1545, 1395, 502, 99, 9, 1, 4300, 11431, 11193, 4879, 1150, 153, 13, 1, 29584, 84037, 89089, 44947, 12719, 2107, 223, 13, 1, 206572, 617831, 706883, 403634, 133623, 27384, 3593, 302, 17, 1, 1442401, 4529489, 5560813, 3529500, 1337042, 324198, 52178, 5532, 397, 17, 1

Offset

0,7

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..65.

Example

Triangle begins
1
1 1
1 1 1
4 5 5 1
16 29 25 5 1
100 213 183 54 9 1
625 1545 1395 502 99 9 1

Crossrefs

Columns give A121142-A121144.

Sequence in context: A309949 A198571 A119822 * A093054 A029685 A153131

Adjacent sequences: A120648 A120649 A120650 * A120652 A120653 A120654

Keyword

nonn,tabl

Author

N. J. A. Sloane, Aug 18 2006

Status

approved