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A159973 Non-refactorable numbers: number of divisors of n does not divide n. 0
3, 4, 5, 6, 7, 10, 11, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 57, 58, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 73, 74, 75, 76, 77, 78, 79, 81, 82, 83, 85 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..71.

PROG

(MAGMA) [ n: n in [1..85] | n mod #Divisors(n) ne 0 ];

CROSSREFS

Complement of A033950.

Sequence in context: A047308 A092860 A112874 * A158008 A106155 A271376

Adjacent sequences:  A159970 A159971 A159972 * A159974 A159975 A159976

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Apr 28 2009

EXTENSIONS

Edited and extended by Klaus Brockhaus, Apr 29 2009

STATUS

approved

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Last modified September 19 15:43 EDT 2020. Contains 337178 sequences. (Running on oeis4.)