A038236 Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*6^j.

1, 4, 6, 16, 48, 36, 64, 288, 432, 216, 256, 1536, 3456, 3456, 1296, 1024, 7680, 23040, 34560, 25920, 7776, 4096, 36864, 138240, 276480, 311040, 186624, 46656, 16384, 172032, 774144, 1935360, 2903040, 2612736, 1306368, 279936

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..35.

Mathematica

Flatten[Table[Binomial[i, j]4^(i-j) 6^j, {i, 0, 10}, {j, 0, i}]] (* Harvey P. Dale, Sep 11 2013 *)

Crossrefs

Sequence in context: A056421 A032295 A072279 * A223269 A264471 A264477

Adjacent sequences: A038233 A038234 A038235 * A038237 A038238 A038239

Keyword

nonn,tabl,easy

Author

N. J. A. Sloane.

Status

approved