A136670 a(n) = floor(a(n-1) * exp(Pi)), starting 0, 1.

0, 1, 23, 532, 12310, 284861, 6591880, 152540668, 3529896712, 81684254837, 1890230234120, 43741236852957, 1012202517391875, 23423067337090791, 542026001764509598, 12542857105806790317, 290250401022346296890

Offset

0,3

Links

Table of n, a(n) for n=0..16.

Mathematica

a[0] = 0; a[1] = 1; a[2] = Floor[Exp[Pi]]; a[n_] := a[n] = Floor[a[n - 1]*Exp[Pi]] out1 = Table[a[n], {n, 0, 20}]
With[{c=Exp[Pi]}, Join[{0}, NestList[Floor[c #]&, 1, 20]]] (* Harvey P. Dale, Jan 04 2012 *)

Prog

(PARI) a(n)=if(n<2, 1, floor(a(n-1)*exp(Pi))) \\ Ralf Stephan, Dec 25 2013

Crossrefs

Sequence in context: A147642 A057686 A042014 * A062360 A062511 A159664

Adjacent sequences: A136667 A136668 A136669 * A136671 A136672 A136673

Keyword

nonn

Author

Roger L. Bagula, Apr 04 2008

Extensions

Clarified name and edited by Ralf Stephan, Dec 25 2013

Status

approved