25769803751domain: NAppears in sequencesa(1) = 23, a(2) = 71, a(n) = 3*a(n-1) - 2*a(n-2) for n>2.at n=29A248877Primes of the form 3*2^k - 25.at n=15A321356a(n) is the least prime p such that the binary expansions of p and of the next prime q > p differ at exactly n positions, and p and q have the same binary length.at n=29A374179