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Powers of 111.
4

%I #22 Oct 12 2019 16:05:41

%S 1,111,12321,1367631,151807041,16850581551,1870414552161,

%T 207616015289871,23045377697175681,2558036924386500591,

%U 283942098606901565601,31517572945366073781711,3498450596935634189769921,388328016259855395064461231,43104409804843948852155196641

%N Powers of 111.

%H T. D. Noe, <a href="/A225374/b225374.txt">Table of n, a(n) for n = 0..100</a>

%H <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (111).

%F a(n) = 3^n * A009981(n) = A000244(n) * A009981(n). - _Zak Seidov_, May 09 2013

%F G.f.: 1/(1 - 111*x). - _R. J. Mathar_, May 09 2013

%p A225374:=n->111^n; seq(A225374(n), n=0..20); # _Wesley Ivan Hurt_, Nov 13 2013

%t Table[111^n, {n, 0, 20}] (* _Wesley Ivan Hurt_, Nov 13 2013 *)

%t NestList[111#&,1,20] (* _Harvey P. Dale_, Oct 12 2019 *)

%Y Cf. A009981 (powers of 37).

%K nonn

%O 0,2

%A _N. J. A. Sloane_, May 08 2013, following a suggestion from _Daniel Forgues_