|
|
A053340
|
|
Terms of A050530 with four prime divisors.
|
|
1
|
|
|
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
|
|
|
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
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|