The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A104168 Smallest Smith number with n prime factors. 1
 4, 27, 636, 378, 729, 648, 576, 2688, 17496, 44928, 75776, 168960, 765952, 319488, 958464, 5537792, 5963776, 2883584, 5767168, 7077888, 279969792, 544997376, 778567680, 2579496960, 4567597056, 3875536896, 22749904896, 60699967488, 87509958656, 164886478848 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 COMMENTS Maximum number of prime factors of a Smith number below 10^9 is 24. LINKS Table of n, a(n) for n=2..31. Patrick Costello, A new largest Smith number, Fibonacci Quarterly 40(4) (2002), 369-371. Underwood Dudley, Smith numbers, Mathematics Magazine 67(1) (1994), 62-65. S. S. Gupta, Smith Numbers, Mathematical Spectrum 37(1) (2004/5), 27-29. S. S. Gupta, Smith Numbers. Eric Weisstein's World of Mathematics, Smith number. Wikipedia, Smith number. A. Wilansky, Smith Numbers, Two-Year College Math. J. 13(1) (1982), p. 21. Amin Witno, Another simple construction of Smith numbers, Missouri J. Math. Sci. 22(2) (2010), 97-101. Amin Witno, Smith multiples of a class of primes with small digital sum, Thai Journal of Mathematics 14(2) (2016), 491-495. EXAMPLE a(4) = 636 because 636 is the smallest Smith number with 4 prime factors. CROSSREFS Cf. A006753, A104169. Sequence in context: A197987 A133018 A210343 * A197990 A362838 A068327 Adjacent sequences: A104165 A104166 A104167 * A104169 A104170 A104171 KEYWORD nonn,base AUTHOR Shyam Sunder Gupta, Mar 10 2005 and May 03 2005 EXTENSIONS a(28)-a(31) from Donovan Johnson, Jan 02 2013 STATUS approved

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

Last modified February 21 03:13 EST 2024. Contains 370219 sequences. (Running on oeis4.)