49025

Appears in sequences

• Odd numbers k such that (10^k - 1)/3 - 2*10^floor(k/2) is a palindromic wing prime (a.k.a. near-repdigit palindromic prime) of the form 3...313...3.at n=19A077775
• a = a(n) is such that the a-th prime p(a) is the least prime with digital sum equal to n, or a(n)=0 if no such prime exists.at n=48A104290
• The number of sigma-admissible subsets of {1,2,...,n} as defined by Marzuola-Miller.at n=27A158449
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 139", based on the 5-celled von Neumann neighborhood.at n=7A270279
• The "word binomial coefficient" of (mu^(n+1) (0) | mu^n (0)), where mu is the Thue-Morse morphism.at n=3A323597
• "Word binomial coefficient" for (x|y) where y is the first n symbols of the Thue-Morse sequence (A010060) and x is the first 2n symbols.at n=16A323598