A248903 Numbers k such that A248891(k) = 3.

9, 12, 15, 17, 18, 22, 27, 32, 34, 39, 69, 70, 71, 79, 128, 143, 172, 226, 241, 242, 248, 269, 322, 325, 403, 405, 406, 420, 745, 2057, 2272, 2606, 2607, 3339, 3340, 3562, 4116, 4117, 4446, 5985, 6834, 7116, 7117, 7490, 7669, 13386, 13388, 15148, 15149, 15150

Offset: 1

Author

Jahangeer Kholdi and Farideh Firoozbakht, Nov 22 2014

Keywords

• nonn

Comments

Sequence A248894 gives terms a(n) such that a(n+1)=a(n)+1.

Links

• Jinyuan Wang, Table of n, a(n) for n = 1..162

Crossrefs

Cf. A001359, A248891, A248894, A248901, A248902.

Programs

PARI

lista(nn) = {my(c=q=0, r, v=List([3, 5, 11, 17])); forprime(p=19, nn, if(p-2==q, listput(v,q); if((t=v[c++]^(1+1/c))>v[c+3] && tJinyuan Wang, Nov 28 2020