cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-1 of 1 results.

A353330 a(n) = A006047(A156552(n)).

Original entry on oeis.org

1, 2, 3, 2, 4, 6, 9, 6, 3, 2, 12, 6, 12, 18, 4, 6, 12, 8, 36, 6, 3, 6, 16, 18, 4, 18, 12, 18, 81, 6, 144, 8, 12, 24, 9, 2, 324, 24, 12, 8, 432, 8, 108, 24, 12, 6, 576, 18, 9, 18, 48, 72, 11664, 6, 4, 54, 12, 216, 972, 24, 3888, 162, 12, 6, 36, 18, 1728, 24, 12, 24, 8748, 6, 5184, 648, 27, 18, 16, 72, 34992, 54, 4, 72
Offset: 1

Views

Author

Antti Karttunen, Apr 20 2022

Keywords

Links

Crossrefs

Cf. A006047, A156552.
Cf. also A329903, A332814, A341353 and A353360.

Programs

  • PARI
    A006047(n) = { my(m=1, d); while(n, d = (n%3); m *= (1+d); n = (n-d)/3); m; };
A156552(n) = { my(f = factor(n), p, p2 = 1, res = 0); for(i = 1, #f~, p = 1 << (primepi(f[i, 1]) - 1); res += (p * p2 * (2^(f[i, 2]) - 1)); p2 <<= f[i, 2]); res };
A353330(n) = A006047(A156552(n));

Formula

a(n) = A006047(A156552(n)).
Showing 1-1 of 1 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.