A038266 Triangle whose (i,j)-th entry is binomial(i,j)*6^(i-j)*12^j.

1, 6, 12, 36, 144, 144, 216, 1296, 2592, 1728, 1296, 10368, 31104, 41472, 20736, 7776, 77760, 311040, 622080, 622080, 248832, 46656, 559872, 2799360, 7464960, 11197440, 8957952, 2985984, 279936, 3919104, 23514624, 78382080, 156764160

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.

Mathematica

Table[Binomial[i, j]6^(i-j) 12^j, {i, 0, 10}, {j, 0, i}]//Flatten (* Harvey P. Dale, Jul 28 2017 *)

Crossrefs

Sequence in context: A324483 A239171 A264955 * A298881 A256875 A117596

Adjacent sequences: A038263 A038264 A038265 * A038267 A038268 A038269

Keyword

nonn,tabl,easy

Author

N. J. A. Sloane.

Status

approved