756840

Appears in sequences

• Numbers k such that x = 2^k-2 satisfies phi(x)+2 = phi(x+2).at n=31A050475
• Numbers that can be expressed as the difference of the squares of primes in exactly twelve distinct ways.at n=17A092008
• a(n) = n*(n-1)*(n-2)*(3*n-2)/6.at n=36A096200
• a(n) = 841*n^2 - 2*n.at n=29A158401
• Triangle read by rows, a(n,k), n>=k>=1, which represent the s=3, h=1 case of a two-parameter generalization of Stirling numbers arising in conjunction with normal ordering.at n=39A203412
• Series reversion of (sqrt(1+4*x) - 1)/2 - x^3.at n=13A229043