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A038297 Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*7^j. 0
1, 9, 7, 81, 126, 49, 729, 1701, 1323, 343, 6561, 20412, 23814, 12348, 2401, 59049, 229635, 357210, 277830, 108045, 16807, 531441, 2480058, 4822335, 5000940, 2917215, 907578, 117649, 4782969, 26040609, 60761421, 78764805 (list; table; graph; refs; listen; history; text; internal format)
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..31.

CROSSREFS

Sequence in context: A231605 A248307 A168159 * A144622 A069242 A071063

Adjacent sequences:  A038294 A038295 A038296 * A038298 A038299 A038300

KEYWORD

nonn,tabl,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified June 17 07:00 EDT 2019. Contains 324183 sequences. (Running on oeis4.)