A129387 Where records occur in A129385.

0, 1, 15, 23, 27, 99, 399, 743, 2285, 2683, 13607, 18675, 27299, 66527, 108899, 242087, 504867, 1985907, 2179519, 7883069, 11798723, 20372799, 29842275, 49022007, 70621263, 91817907

Offset

1,3

Links

Table of n, a(n) for n=1..26.

Example

The fourth record in A129385 is A129386(4) = 11 = A129385(23), hence a(4) = 23.

Prog

(PARI) lista(nn) = {my(m, q, r); print1(0); for(k=1, nn, if(k%4 && !(k%2 && isprime((k+1)/2)), q=4+k%2; while(!ispower(q, , &m) || !isprime((q+k)/2), q+=2); if(m>r, print1(", ", k); r=m))); } \\ Jinyuan Wang, Dec 05 2020

Crossrefs

Cf. A129385, A129386 (records).

Sequence in context: A014312 A371894 A325823 * A341170 A171167 A242412

Adjacent sequences: A129384 A129385 A129386 * A129388 A129389 A129390

Keyword

nonn,more

Author

Klaus Brockhaus, Apr 14 2007

Extensions

a(16) inserted by and more terms from Jinyuan Wang, Dec 04 2020

Status

approved