OFFSET
1,1
LINKS
Donovan Johnson, Table of n, a(n) for n = 1..200
EXAMPLE
49 is in the sequence since the gap between it the previous prime power, 32, is greater than any previous gap.
PROG
(PARI) isA025475(n) = (omega(n) == 1 & !isprime(n)) || (n == 1)
d_max=0; n_prev=1; for(n=2, 32e6, if(isA025475(n), d=n-n_prev; if(d>d_max, print(n); d_max=d); n_prev=n))
CROSSREFS
KEYWORD
nonn
AUTHOR
Michael B. Porter, Nov 01 2009
STATUS
approved