43265

Appears in sequences

• a(n) = 64*n^2 + 1.at n=26A158686
• Triangle read by rows: T(n, k) = 2^n*(q^k - 1)*(q^(n - k) - 1) + 1, where q = 3.at n=24A176794
• Numbers of the form m^2 + 1 that can be expressed in more than one way as j^2 + k^2 with j > k > 1 and gcd(j,k) = 1.at n=26A300166
• a(n) = (A001359(n+1)^2 - 1)/24, where A001359 = lesser of twin primes; or: pentagonal numbers (A000326) whose indices are twin ranks (A002822).at n=34A308344
• Expansion of Product_{i>=1, j>=1, k>=1} (1 + i*j*k*x^(i*j*k)).at n=12A318482
• Pentagonal numbers which are products of three distinct primes.at n=41A381650