A038292 Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*2^j.

1, 9, 2, 81, 36, 4, 729, 486, 108, 8, 6561, 5832, 1944, 288, 16, 59049, 65610, 29160, 6480, 720, 32, 531441, 708588, 393660, 116640, 19440, 1728, 64, 4782969, 7440174, 4960116, 1837080, 408240, 54432, 4032, 128, 43046721, 76527504

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..37.

Crossrefs

Sequence in context: A248314 A174837 A096042 * A294685 A200238 A368982

Adjacent sequences: A038289 A038290 A038291 * A038293 A038294 A038295

Keyword

nonn,tabl,easy

Author

N. J. A. Sloane.

Status

approved