203897

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of function f(x) = 8x + 1.at n=23A023291
• Primes which occur as the difference of consecutive prime powers >1 as and when they occur.at n=25A073652
• Primes which are the difference between two successive nontrivial prime powers (A025475).at n=21A076047
• a(1)=1; then for n even, a(n)=(sum of previous terms times n) plus 1, for n odd, a(n)=(sum of previous terms times n) minus 1.at n=7A095237
• INVERT transform of phi(n), A000010.at n=16A159929
• Prime numbersat n=18294