A223548 Smallest prime factors for sequence A223546.
13, 229, 269, 331, 1036991, 193, 1187, 379, 942381313, 1078717, 1690920279179, 593, 181, 1433, 641, 139, 631, 2622013, 1123, 130337, 223, 155784593, 3746107, 1223, 13791824242727551, 67623587, 853, 299635177, 3966293, 197, 4755811387725362803, 263, 40637, 577
Offset: 1
Keywords
Examples
a(3) = 229, the smallest prime factor of A223546(3) = 233335657 = 229*307*3319.
Links
- Sean A. Irvine, Table of n, a(n) for n = 1..75 (terms 1..34 from Sidney Cadot)
Formula
a(n) = 463 for n >= 74. - Sean A. Irvine, Jul 20 2025
Extensions
a(15)-a(34) from Chai Wah Wu, Oct 10 2019