A186298 A007520(n)-2.

1, 9, 17, 41, 57, 65, 81, 105, 129, 137, 161, 177, 209, 225, 249, 281, 305, 329, 345, 377, 417, 441, 465, 489, 497, 521, 545, 561, 569, 585, 617, 641, 657, 681, 689, 737, 785, 809, 825, 857, 881, 905, 945, 969, 1017, 1049, 1089, 1121, 1161, 1169, 1185

Offset: 1

Author

Marco Matosic, Feb 17 2011

Keywords

• nonn

Programs

PARI

isok(n) = isprime(n+2) && (n % 8 == 1) \\ Michel Marcus, Jul 16 2013