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A038296
Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*6^j.
0
1, 9, 6, 81, 108, 36, 729, 1458, 972, 216, 6561, 17496, 17496, 7776, 1296, 59049, 196830, 262440, 174960, 58320, 7776, 531441, 2125764, 3542940, 3149280, 1574640, 419904, 46656, 4782969, 22320522, 44641044, 49601160, 33067440
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.
CROSSREFS
Sequence in context: A196005 A196002 A370151 * A058276 A184964 A185364
KEYWORD
nonn,tabl,easy
AUTHOR
STATUS
approved