OFFSET
0,1
COMMENTS
Conjecture: there are infinitely many composite Fermat numbers such that no one of them has a divisor that belongs to this sequence.
LINKS
Wikipedia, Fermat number
Index entries for linear recurrences with constant coefficients, signature (2,-1).
FORMULA
G.f.: (5 + 13*x)/(1 - x)^2.
MAPLE
seq(18*n+5, n=0..53);
MATHEMATICA
Table[18*n + 5, {n, 0, 53}]
LinearRecurrence[{2, -1}, {5, 23}, 60] (* Harvey P. Dale, Aug 25 2017 *)
PROG
(Magma) [18*n+5: n in [0..53]];
(PARI) for(n=0, 53, print1(18*n+5, ", "));
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Arkadiusz Wesolowski, May 07 2014
STATUS
approved