34570

Appears in sequences

• a(n) = p(1)p(n) + p(2)p(n-1) + ... + p(k)p(n+1-k), where k = [ (n+1)/2 ], p = A000040 = the primes.at n=32A024697
• Numbers n such that 7^n - 8 is prime.at n=17A217131
• Triangle T(n,k): the number of binary sequences of n zeros and n ones in which the longest run is of length k.at n=49A229756