A340770 Indices k of prime numbers such that prime(k)-2 and prime(k)^2-2 are both prime numbers.
3, 4, 6, 8, 14, 18, 27, 34, 65, 82, 99, 141, 172, 177, 191, 202, 216, 226, 319, 333, 337, 445, 470, 476, 496, 552, 559, 564, 578, 602, 637, 672, 829, 850, 863, 871, 949, 1005, 1065, 1075, 1190, 1199, 1231, 1239, 1306, 1329, 1446, 1450, 1529, 1619, 1635, 1643
Offset: 1
Examples
6 is in the sequence since prime(6)=13 and 13-2=11 and 13^2-2=167 are both prime numbers.
Links
- François Marques, Table of n, a(n) for n = 1..10000
Programs
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PARI
lista(n) = {my(l=List,k=1); while(#l
Comments