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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 A068327 A066842

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

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Last modified October 27 06:09 EDT 2020. Contains 338035 sequences. (Running on oeis4.)