A178599 a(n) is the smallest multiple of a(n-1) that is greater than n^n.

1, 4, 28, 280, 3360, 47040, 846720, 16934400, 389491200, 10126771200, 293676364800, 9103967308800, 309534888499200, 11143255985971200, 445730239438848000, 18720670056431616000, 842430152539422720000

Offset

1,2

Links

Table of n, a(n) for n=1..17.

Mathematica

nxt[{n_, a_}]:={n+1, a*Ceiling[(n+1)^(n+1)/a]}; NestList[nxt, {1, 1}, 20][[All, 2]] (* Harvey P. Dale, May 06 2021 *)

Prog

(PARI) al(n)=local(r, t); vector(n, k, if(k==1, r=t=1, r*=(t=ceil(k^k/r))))

Crossrefs

Cumulative product of A178598.

Sequence in context: A032274 A182964 A306228 * A369088 A007559 A138208

Adjacent sequences: A178596 A178597 A178598 * A178600 A178601 A178602

Keyword

nonn

Author

Franklin T. Adams-Watters, May 30 2010

Status

approved