A038300 Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*10^j.

1, 9, 10, 81, 180, 100, 729, 2430, 2700, 1000, 6561, 29160, 48600, 36000, 10000, 59049, 328050, 729000, 810000, 450000, 100000, 531441, 3542940, 9841500, 14580000, 12150000, 5400000, 1000000, 4782969, 37200870, 124002900, 229635000

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.

Mathematica

Flatten[Table[Binomial[i, j]9^(i-j) 10^j, {i, 0, 10}, {j, 0, i}]] (* Harvey P. Dale, Apr 29 2019 *)

Crossrefs

Sequence in context: A033046 A025635 A116555 * A201948 A249311 A041039

Adjacent sequences: A038297 A038298 A038299 * A038301 A038302 A038303

Keyword

nonn,tabl,easy

Author

N. J. A. Sloane.

Status

approved