A104358 Smallest prime factor of A104357(n) = A104350(n) - 1.

1, 5, 11, 59, 179, 1259, 11, 7559, 37799, 415799, 71, 227, 5981, 9067, 1135133999, 11717, 61, 79, 5499724229999, 97, 1543, 31, 29220034833989999, 8937119, 181, 401, 124759, 443851, 31, 2141, 3082663, 8191, 37230797, 1697, 1408101540804746673385499999, 10613, 73, 59, 107, 79, 617, 163, 173

Offset: 2

Author

Reinhard Zumkeller, Mar 06 2005

Keywords

• nonn

Comments

a(n) = A020639(A104357(n)).

Links

• Tyler Busby, Table of n, a(n) for n = 2..181 (terms 2..120 from Chai Wah Wu, terms 121..160 from Max Alekseyev)
• Reinhard Zumkeller, Products of largest prime factors of numbers <= n

Crossrefs

Cf. A104357, A104359, A104360, A104361, A104362, A104363, A104364, A104366, A054415, A057713.

Extensions

Typo in data corrected by Gionata Neri, Oct 20 2017