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A038296
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Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*6^j.
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0
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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
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OFFSET
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0,2
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REFERENCES
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B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons, Match, No. 34 (Oct 1996), pp. 109-121.
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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