login
A225374
Powers of 111.
4
1, 111, 12321, 1367631, 151807041, 16850581551, 1870414552161, 207616015289871, 23045377697175681, 2558036924386500591, 283942098606901565601, 31517572945366073781711, 3498450596935634189769921, 388328016259855395064461231, 43104409804843948852155196641
OFFSET
0,2
FORMULA
a(n) = 3^n * A009981(n) = A000244(n) * A009981(n). - Zak Seidov, May 09 2013
G.f.: 1/(1 - 111*x). - R. J. Mathar, May 09 2013
From Elmo R. Oliveira, Jul 06 2025: (Start)
E.g.f.: exp(111*x).
a(n) = 111^n.
a(n) = 111*a(n-1). (End)
MAPLE
A225374:=n->111^n; seq(A225374(n), n=0..20); # Wesley Ivan Hurt, Nov 13 2013
MATHEMATICA
Table[111^n, {n, 0, 20}] (* Wesley Ivan Hurt, Nov 13 2013 *)
NestList[111#&, 1, 20] (* Harvey P. Dale, Oct 12 2019 *)
CROSSREFS
Cf. A000244 (powers of 3), A009981 (powers of 37).
Sequence in context: A298677 A172175 A178906 * A015262 A201430 A262641
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, May 08 2013, following a suggestion from Daniel Forgues
STATUS
approved