22095

Appears in sequences

• Number of lunar primes with <= n digits.at n=4A087638
• Numbers n such that 9*10^n + 2*R_n + 5 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=13A103095
• Write 0, 1, ..., n in base 3 and add as if they were decimal numbers.at n=44A121718
• a(n) = 12*a(n-1)-33*a(n-2) for n > 1; a(0) = 1, a(1) = 7.at n=5A162757
• G.f. satisfies: A(x) = x/(x - B(x^2)) where B(x/A(x)) = x and B(x) is the g.f. of A141200.at n=17A178852