OFFSET
1,1
COMMENTS
These are the primes preceding the unique values of A174641. That sequence is the start of a run of non-Ramanujan primes, so the previous prime is the Ramanujan prime. - Dana Jacobsen, Jul 14 2016
PROG
(Perl) perl -Mntheory=:all -nE 'my $n = $1 if /(\d+)$/; say ++$x, " ", prev_prime($n) unless $seen{$n}++; ' b174641.txt # Dana Jacobsen, Jul 14 2016
(Perl) use ntheory ":all"; my($max, $r)=(0, ramanujan_primes(1e7)); for (0..$#$r-1) { my $d=prime_count($r->[$_+1])-prime_count($r->[$_]); if ($d > $max) { say $r->[$_]; $max=$d; } } # Dana Jacobsen, Jul 14 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
John W. Nicholson, Dec 22 2013
EXTENSIONS
a(20) to a(26) from Dana Jacobsen, Jul 14 2016
STATUS
approved