34683domain: NAppears in sequencesa(n) = [ a(n-1)/a(1) + a(n-3)/a(3) + a(n-5)/a(5) + ... ], for n >= 3.at n=33A022865T(2n,n-2), T given by A026703.at n=6A026706Numbers k such that 449*2^k+1 is prime.at n=22A323194a(n) = number of Yamanouchi words over the alphabet {1, 2, 3} of length n that start with 3.at n=13A369591