OFFSET
1,2
COMMENTS
Numbers k such that k | A000213(k).
EXAMPLE
3 is a term since A000213(3) = 3 is divisible by 3.
MATHEMATICA
With[{m = 15000}, Position[LinearRecurrence[{1, 1, 1}, {1, 1, 3}, m]/Range[m], _?IntegerQ] // Flatten]
PROG
(PARI) lista(kmax) = {my(t0 = 1, t1 = 1, t2 = 1, t3); print1("1, "); for(k = 3, kmax, t3 = t0 + t1 + t2; if(!(t3 % k), print1(k, ", ")); t0 = t1; t1 = t2; t2 = t3); }
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Amiram Eldar, May 21 2024
STATUS
approved