A038306 Triangle whose (i,j)-th entry is binomial(i,j)*10^(i-j)*4^j.

1, 10, 4, 100, 80, 16, 1000, 1200, 480, 64, 10000, 16000, 9600, 2560, 256, 100000, 200000, 160000, 64000, 12800, 1024, 1000000, 2400000, 2400000, 1280000, 384000, 61440, 4096, 10000000, 28000000, 33600000, 22400000, 8960000

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

Table[Binomial[i, j]10^(i-j) 4^j, {i, 0, 10}, {j, 0, i}]//Flatten (* Harvey P. Dale, Dec 20 2022 *)

Crossrefs

Sequence in context: A232908 A216653 A267180 * A317597 A357423 A320938

Adjacent sequences: A038303 A038304 A038305 * A038307 A038308 A038309

Keyword

nonn,tabl,easy

Author

N. J. A. Sloane

Status

approved