A168558 a(n) = n + a(n-1)^2 for n>1, a(1)=0.

0, 2, 7, 53, 2814, 7918602, 62704257634411, 3931823925482590177731316929, 15459239380997324838780881526042196711953237316641991050

Offset

1,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..13

Mathematica

RecurrenceTable[{a[1] == 0, a[n] == a[n-1]^2 + n}, a, {n, 20}] (* Vincenzo Librandi, Sep 24 2014 *)

Prog

(Magma) [n le 1 select (n-1) else Self(n-1)^2+n: n in [1..10] ]; // Vincenzo Librandi, Sep 24 2014

Crossrefs

Sequence in context: A053465 A193191 A180720 * A024027 A079410 A371617

Adjacent sequences: A168555 A168556 A168557 * A168559 A168560 A168561

Keyword

nonn

Author

Vincenzo Librandi, Nov 29 2009

Status

approved