34028

Appears in sequences

• a(n) = (9*n+1)*(9*n+8).at n=20A001534
• Numbers n such that 99*2^n-1 is prime.at n=33A050575
• a(n) = floor((x^n-(1-x)^n)/sqrt(7)+1/2) where x = (sqrt(7)+1)/2.at n=18A136425
• Numbers in a hexagonal tiling (seen as concentric rings) which have exactly three neighbors whose difference from it is prime.at n=31A372223