A053340 - OEIS

A053340

Terms of A050530 with four prime divisors.

5865, 8645, 10005, 10465, 13685, 15045, 15295, 16269, 18285, 20445, 22015, 24871, 26845, 27965, 28405, 28815, 29733, 30705, 31031, 31255, 33215, 35245, 36105, 37037, 37145, 37365, 37765, 37995, 38985, 39831, 40579, 41041, 43435, 44135

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

FORMULA

n=pqrs, having 4 prime divisors, squarefree and n-phi(n) is a prime

EXAMPLE

The 3rd entry is 10005=3*5*23*29, also in A050530 and A051953(10005)=5077 is a prime.

CROSSREFS

Cf. A051953, A050530.

Sequence in context: A183843 A212478 A333232 * A291597 A233945 A264216

Adjacent sequences: A053337 A053338 A053339 * A053341 A053342 A053343

KEYWORD

nonn

AUTHOR

Labos Elemer, Jan 05 2000

STATUS

approved