A336843 Period of binary representation of 1/A003961(n): a(n) = A007733(A003961(n)).

1, 2, 4, 6, 3, 4, 10, 18, 20, 6, 12, 12, 8, 10, 12, 54, 18, 20, 11, 6, 20, 12, 28, 36, 21, 8, 100, 30, 5, 12, 36, 162, 12, 18, 30, 60, 20, 22, 8, 18, 14, 20, 23, 12, 60, 28, 52, 108, 110, 42, 36, 24, 58, 100, 12, 90, 44, 10, 60, 12, 66, 36, 20, 486, 24, 12, 35, 18, 28, 30, 9, 180, 39, 20, 84, 66, 60, 8, 82, 54, 500

Offset: 1

Author

Antti Karttunen, Aug 06 2020

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 1..16383
• Antti Karttunen, Data supplement: n, a(n) computed for n = 1..65537

Crossrefs

Permutation of A002326.

Cf. A003961, A007733, A048673, A108228, A336842.

Programs

PARI

A336843(n) = { my(f = factor(n)); for(i=1, #f~, f[i, 1] = nextprime(f[i, 1]+1)); znorder(Mod(2,factorback(f))); };

Formula

a(n) = A007733(A003961(n)).

a(n) = A002326(A108228(n)) = A002326(A048673(n)-1).