0,1

Harvey P. Dale, Table of n, a(n) for n = 0..332

Quynh Nguyen, Jean Pedersen, and Hien T. Vu, New Integer Sequences Arising From 3-Period Folding Numbers, Vol. 19 (2016), Article 16.3.1. Cites this sequence.

G.f.: -(72022409665839104*x^10 -95936100375199744*x^9 +41035167933923328*x^8 -7266644321632256*x^7 +581441424424960*x^6 -21804053415936*x^5 +388080675136*x^4 -3261182144*x^3 +12564486*x^2 -20470*x +11) / ((x -1)*(2*x -1)*(4*x -1)*(8*x -1)*(16*x -1)*(32*x -1)*(64*x -1)*(128*x -1)*(256*x -1)*(512*x -1)*(1024*x -1)). - Colin Barker, Feb 14 2015

a(n) = 1+2^n+4^n+8^n+16^n+32^n+64^n+128^n+256^n+512^n+1024^n. - Colin Barker, Feb 15 2015

a(n) = A060885(A000079(n)). - Michel Marcus, Apr 06 2016

with(numtheory, cyclotomic):seq(cyclotomic(11, 2^i), i=0..24);

Table[Total[x^Range[0, 10]], {x, 2^Range[0, 10]}] (* Harvey P. Dale, Mar 05 2014 *)

(PARI) a(n) = polcyclo(11, 2^n); \\ Michel Marcus, Apr 12 2014

Cf. A000079, A060885.

Sequence in context: A167249 A180587 A060885 * A004822 A265876 A078271

Adjacent sequences: A020516 A020517 A020518 * A020520 A020521 A020522

nonn,easy

approved