A324056 a(n) = A000593(A005940(1+n)).

1, 1, 4, 1, 6, 4, 13, 1, 8, 6, 24, 4, 31, 13, 40, 1, 12, 8, 32, 6, 48, 24, 78, 4, 57, 31, 124, 13, 156, 40, 121, 1, 14, 12, 48, 8, 72, 32, 104, 6, 96, 48, 192, 24, 248, 78, 240, 4, 133, 57, 228, 31, 342, 124, 403, 13, 400, 156, 624, 40, 781, 121, 364, 1, 18, 14, 56, 12, 84, 48, 156, 8, 112, 72, 288, 32, 372, 104, 320, 6, 168, 96, 384, 48

Offset: 0

Author

Antti Karttunen, Feb 14 2019

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 0..8191
• Antti Karttunen, Data supplement: n, a(n) computed for n = 0..70327

Crossrefs

Cf. A000593, A005940, A038712, A324054.

Programs

PARI

A000593(n) = sigma(n>>valuation(n, 2)); \\ From A000593
A005940(n) = { my(p=2, t=1); n--; until(!n\=2, if((n%2), (t*=p), p=nextprime(p+1))); t }; \\ From A005940
A324056(n) = A000593(A005940(1+n));

Formula

a(n) = A000593(A005940(1+n)).

a(n) = A324054(n) / A038712(1+n).