207017

Properties

Appears in sequences

• Primes p such that 1p1, 3p3, 7p7 and 9p9 are all primes.at n=28A059694
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n)^2, where a(0) = 1, a(1) = 2, b(0) = 3, b(1) = 4, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences.at n=18A296245
• Expansion of e.g.f. (sec(x) + tan(x))*exp(x)*BesselI(0,2*x).at n=9A306832
• Prime numbersat n=18549