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A015499 a(0)=1, a(1)=11, a(n) = sum_{k=0}^{k=n-1} 11^k a(k). 1

%I

%S 1,11,122,14884,19825488,290284795296,46750946852011392,

%T 82822200907043005634304,1613970474494103062192651148288,

%U 345968906493565448004393168763031894016,815776584570266460972904878145357549417415811072

%N a(0)=1, a(1)=11, a(n) = sum_{k=0}^{k=n-1} 11^k a(k).

%F a(n) = (11^(n-2) + 1) * a(n-1). - _Vincenzo Librandi_, Nov 11 2012

%o (MAGMA) I:=[1, 11, 122]; [n le 3 select I[n] else (11^(n-2)+1)*Self(n-1): n in [1..15]]; // _Vincenzo Librandi_, Nov 11 2012

%K nonn,easy

%O 0,2

%A _Olivier GĂ©rard_

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Last modified May 22 04:38 EDT 2022. Contains 353933 sequences. (Running on oeis4.)