1,2

Table of n, a(n) for n=1..67.

a(n) = a(n-1)+a(n-16)-a(n-17). G.f. x*(1 +x +x^2 +x^3 +x^4 +x^5 +x^6 +x^7 +x^8 +x^9 +x^10 +x^11 +x^12 +x^13 +x^14 +x^15 +x^16) / ( (1+x) *(1+x^2) *(1+x^4) *(1+x^8) *(x-1)^2 ). - R. J. Mathar, Sep 30 2013

Complement[Range[100], 17Range[Floor[100/17]]] (* Harvey P. Dale, Oct 24 2011 *)

(Sage) [i for i in xrange(0, 72) if gcd(17, i) == 1]

Sequence in context: A132033 A194966 A133137 * A023810 A102800 A072676

Adjacent sequences: A160540 A160541 A160542 * A160544 A160545 A160546

nonn,easy

Zerinvary Lajos, May 18 2009

approved