The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A240548 Greatest prime factor of n^5 + 1. 8
 2, 11, 61, 41, 521, 101, 191, 331, 1181, 9091, 13421, 19141, 2411, 101, 1531, 61681, 101, 9041, 2251, 152381, 185641, 224071, 211, 5791, 9161, 1021, 271, 53951, 401, 71261, 21821, 4051, 1151041, 259631, 132631, 6781, 1824841, 2031671, 41011, 20641, 4111, 23201 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS T. D. Noe, Table of n, a(n) for n = 1..10000 EXAMPLE a(2) = 11 because 2^5 + 1 = 33 = 3 * 11. a(3) = 61 because 3^5 + 1 = 244 = 2^2 * 61. a(4) = 41 because 4^5 + 1 = 1025 = 5^2 * 41. a(2272) = 2273 because 2272^5 + 1 = 11^2 * 311 * 491 * 1171 * 1231 * 2273. MATHEMATICA Table[FactorInteger[n^5 + 1][[-1, 1]], {n, 100}] CROSSREFS Cf. A002561, A014442, A081256, A096172, A240549-A240553. Sequence in context: A251180 A286194 A164034 * A255549 A275229 A074615 Adjacent sequences:  A240545 A240546 A240547 * A240549 A240550 A240551 KEYWORD nonn AUTHOR T. D. Noe, Apr 07 2014 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 20 08:54 EDT 2021. Contains 343125 sequences. (Running on oeis4.)