A304530 Positions of odd terms in A304531.

1, 4, 8, 11, 14, 18, 25, 28, 32, 35, 39, 42, 45, 49, 52, 55, 59, 66, 69, 73, 76, 80, 91, 94, 115, 118, 122, 125, 128, 132, 139, 142, 146, 149, 152, 156, 160, 163, 167, 170, 173, 177, 196, 199, 203, 206, 209, 213, 220, 223, 227, 230, 234, 237, 240, 244, 247, 250, 254, 261, 264, 268, 271, 275, 278, 281, 285, 288, 291, 295, 309, 312, 316, 319, 322, 326, 338

Offset: 1

Author

Antti Karttunen, May 14 2018

Keywords

• nonn

Comments

After A304531(2) = 2, the positions of other primes in A304531 are: 4, 11, 42, 237, 1798, 7192, 69611, 431203, 2401568, ...

Links

• Antti Karttunen, Table of n, a(n) for n = 1..50000

Crossrefs

Cf. A304531.

Differs from A303750 for the first time at n=18, where a(18) = 66, while A303750(18) = 71.

Programs

PARI

for(n=1,oo,if(A304531(n)%2, print1(n,", ")))