OFFSET
1,1
EXAMPLE
11 is a term since k = primepi(11) = 5 and 11 == 1 (mod 2*5).
13 is a term since k = primepi(13) = 6 and 13 == 1 (mod 2*6).
64661 is a term since k = primepi(64661) = 6466 and 64661 == 1 (mod 2*6466).
PROG
(PARI) lista(pmax) = {my(k = 0); forprime(p = 1, pmax, k+=2; if((p-1)%k==0, print1(p, ", "))); } \\ Amiram Eldar, Feb 01 2023
CROSSREFS
KEYWORD
nonn
AUTHOR
Najeem Ziauddin, Feb 01 2023
EXTENSIONS
a(7)-a(8) from Michel Marcus, Feb 01 2023
a(9)-a(23) from Jon E. Schoenfield, Feb 01 2023
a(24)-a(26) from Amiram Eldar, Feb 01 2023
STATUS
approved