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A038228 Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*10^j. 0
1, 3, 10, 9, 60, 100, 27, 270, 900, 1000, 81, 1080, 5400, 12000, 10000, 243, 4050, 27000, 90000, 150000, 100000, 729, 14580, 121500, 540000, 1350000, 1800000, 1000000, 2187, 51030, 510300, 2835000, 9450000, 18900000, 21000000, 10000000 (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..35.

EXAMPLE

1; 3,10; 9,60,100; 27,270,900,1000; 81,1080,5400,12000,10000; ...

CROSSREFS

Sequence in context: A222345 A202339 A234642 * A213214 A009030 A168331

Adjacent sequences:  A038225 A038226 A038227 * A038229 A038230 A038231

KEYWORD

nonn,tabl,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified June 16 19:43 EDT 2019. Contains 324155 sequences. (Running on oeis4.)