A038298 Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*8^j.

1, 9, 8, 81, 144, 64, 729, 1944, 1728, 512, 6561, 23328, 31104, 18432, 4096, 59049, 262440, 466560, 414720, 184320, 32768, 531441, 2834352, 6298560, 7464960, 4976640, 1769472, 262144, 4782969, 29760696, 79361856, 117573120

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..31.

Mathematica

Flatten[Table[Binomial[i, j]9^(i-j) 8^j, {i, 0, 10}, {j, 0, i}]] (* Harvey P. Dale, Dec 11 2011 *)

Crossrefs

Sequence in context: A030027 A082201 A357880 * A013439 A180680 A165398

Adjacent sequences: A038295 A038296 A038297 * A038299 A038300 A038301

Keyword

nonn,tabl,easy

Author

N. J. A. Sloane.

Status

approved