A339809 a(n) = A019565(n) - 1.

0, 1, 2, 5, 4, 9, 14, 29, 6, 13, 20, 41, 34, 69, 104, 209, 10, 21, 32, 65, 54, 109, 164, 329, 76, 153, 230, 461, 384, 769, 1154, 2309, 12, 25, 38, 77, 64, 129, 194, 389, 90, 181, 272, 545, 454, 909, 1364, 2729, 142, 285, 428, 857, 714, 1429, 2144, 4289, 1000, 2001, 3002, 6005, 5004, 10009, 15014, 30029, 16, 33, 50

Offset

0,3

Links

Antti Karttunen, Table of n, a(n) for n = 0..8192

Prog

(PARI)
A019565(n) = { my(m=1, p=1); while(n>0, p = nextprime(1+p); if(n%2, m *= p); n >>= 1); (m); };
A339809(n) = (A019565(n)-1);

Crossrefs

Cf. A019565, A339810, A339811, A339812.

Cf. also A339820, A339821.

Sequence in context: A278508 A296208 A324142 * A360896 A375888 A084432

Adjacent sequences: A339806 A339807 A339808 * A339810 A339811 A339812

Keyword

nonn

Author

Antti Karttunen, Dec 18 2020

Status

approved