A038210 Triangle whose (i,j)-th entry is binomial(i,j)*2^(i-j)*4^j.

1, 2, 4, 4, 16, 16, 8, 48, 96, 64, 16, 128, 384, 512, 256, 32, 320, 1280, 2560, 2560, 1024, 64, 768, 3840, 10240, 15360, 12288, 4096, 128, 1792, 10752, 35840, 71680, 86016, 57344, 16384, 256, 4096, 28672, 114688, 286720, 458752, 458752, 262144

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..43.

Mathematica

Flatten[Table[Binomial[i, j]2^(i-j) 4^j, {i, 0, 10}, {j, 0, i}]] (* Harvey P. Dale, Nov 22 2011 *)

Crossrefs

Sequence in context: A079102 A071337 A087481 * A244640 A230874 A349452

Adjacent sequences: A038207 A038208 A038209 * A038211 A038212 A038213

Keyword

nonn,tabl,easy

Author

N. J. A. Sloane.

Status

approved