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A145105 a(n) = n if n is prime or a perfect number, otherwise a(n) = 0. 0
0, 2, 3, 0, 5, 6, 7, 0, 0, 0, 11, 0, 13, 0, 0, 0, 17, 0, 19, 0, 0, 0, 23, 0, 0, 0, 0, 28, 29, 0, 31, 0, 0, 0, 0, 0, 37, 0, 0, 0, 41, 0, 43, 0, 0, 0, 47, 0, 0, 0, 0, 0, 53, 0, 0, 0, 0, 0, 59, 0, 61, 0, 0, 0, 0, 0, 67, 0, 0, 0, 71, 0, 73, 0, 0, 0, 0, 0, 79, 0, 0, 0, 83, 0, 0, 0, 0, 0, 89, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..92.

Y. K. Huen, A matrix map for prime and non-prime numbers, International Journal Of Mathematics, Education, Science and Technolology Vol. 6: pages 913-920, 1994.

CROSSREFS

Sequence in context: A219695 A267186 A248092 * A140700 A055615 A243059

Adjacent sequences:  A145102 A145103 A145104 * A145106 A145107 A145108

KEYWORD

nonn,less

AUTHOR

Huen Yeong Kong (cosmology(AT)pacific.net.sg), Oct 02 2008

EXTENSIONS

Edited and corrected by Joerg Arndt, Dec 27 2018

STATUS

approved

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Last modified July 12 06:48 EDT 2020. Contains 335657 sequences. (Running on oeis4.)