A038254 - OEIS

A038254

Triangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*12^j.

1, 5, 12, 25, 120, 144, 125, 900, 2160, 1728, 625, 6000, 21600, 34560, 20736, 3125, 37500, 180000, 432000, 518400, 248832, 15625, 225000, 1350000, 4320000, 7776000, 7464960, 2985984, 78125, 1312500, 9450000, 37800000, 90720000

(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..32.

MATHEMATICA

Flatten[Table[Binomial[i, j]5^(i-j) 12^j, {i, 0, 10}, {j, 0, i}]] (* Harvey P. Dale, Apr 24 2012 *)

CROSSREFS

Sequence in context: A108201 A289586 A223233 * A223321 A073095 A309323

Adjacent sequences: A038251 A038252 A038253 * A038255 A038256 A038257

KEYWORD

nonn,tabl,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved