51477

Appears in sequences

• Numbers in which all pairs of consecutive base-7 digits differ by 3.at n=46A033078
• Numbers k such that 37*2^k-1 is prime.at n=6A050544
• a(n) = 4*A000984(n) - 3.at n=8A134770
• A134770 interleaved with threes.at n=16A134771
• G.f.: Product_{n>=1} (1 + Lucas(n)*x^n + (-1)^n*x^(2*n)) where Lucas(n) = A000204(n).at n=16A203801
• Expansion of Product_{i>=1, j>=1, k>=1} (1 + x^(i*j*k))^(i*j*k).at n=12A318414
• Numbers that are the sum of five fifth powers in two or more ways.at n=2A342685
• Numbers that are the sum of five fifth powers in exactly two ways.at n=2A342686