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A038251 Triangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*9^j. 0
1, 5, 9, 25, 90, 81, 125, 675, 1215, 729, 625, 4500, 12150, 14580, 6561, 3125, 28125, 101250, 182250, 164025, 59049, 15625, 168750, 759375, 1822500, 2460375, 1771470, 531441, 78125, 984375, 5315625, 15946875, 28704375, 31000725 (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..33.

CROSSREFS

Sequence in context: A062812 A032499 A112084 * A034498 A219499 A048884

Adjacent sequences:  A038248 A038249 A038250 * A038252 A038253 A038254

KEYWORD

nonn,tabl,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified June 6 14:04 EDT 2020. Contains 334827 sequences. (Running on oeis4.)