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A038266
Triangle whose (i,j)-th entry is binomial(i,j)*6^(i-j)*12^j.
0
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.
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
KEYWORD
nonn,tabl,easy
AUTHOR
STATUS
approved