A038228 Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*10^j.

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

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: A353618 A202339 A234642 * A213214 A009030 A168331

Adjacent sequences: A038225 A038226 A038227 * A038229 A038230 A038231

Keyword

nonn,tabl,easy

Author

N. J. A. Sloane.

Status

approved