A038263 Triangle whose (i,j)-th entry is binomial(i,j)*6^(i-j)*9^j.

1, 6, 9, 36, 108, 81, 216, 972, 1458, 729, 1296, 7776, 17496, 17496, 6561, 7776, 58320, 174960, 262440, 196830, 59049, 46656, 419904, 1574640, 3149280, 3542940, 2125764, 531441, 279936, 2939328, 13226976, 33067440, 49601160

Offset

0,2

References

B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons, Match, No. 34 (Oct 1996), pp. 109-121.

Links

Table of n, a(n) for n=0..32.

Crossrefs

Sequence in context: A100096 A192172 A057397 * A004989 A147355 A154139

Adjacent sequences: A038260 A038261 A038262 * A038264 A038265 A038266

Keyword

nonn,tabl,easy

Author

N. J. A. Sloane.

Status

approved