A195759 Greater prime factor of n-th Blum number.

7, 11, 19, 23, 11, 31, 43, 19, 47, 23, 59, 67, 19, 71, 31, 79, 83, 23, 43, 103, 107, 47, 31, 127, 131, 59, 139, 23, 151, 67, 43, 163, 71, 167, 47, 179, 79, 191, 83, 31, 199, 211, 59, 223, 227, 31, 239, 103, 67, 107, 251, 71, 263, 271, 43, 283, 79, 127, 47

Offset: 1

Author

Reinhard Zumkeller, Sep 23 2011

Keywords

• nonn

Comments

A195758(n) * a(n) = A016105(n); a(n) > A195758(n);

a(n) = A006530(A016105(n)).

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
• Wikipedia, Blum integer

Crossrefs

Cf. A070647.

Programs

Haskell

a195759 = a006530 . a016105