28340

Appears in sequences

• Sum of the first n twin prime pairs.at n=36A086169
• Triangle of coefficients of g.f. a*(1+x)^n + b*(1-x)^(n+2)*polylog(-n-1, x)/x + 2^n*c*(1-x)^(n+1)*LerchPhi(x, -n, 1/2), with a = -2, b = 2, c = 1.at n=24A168524
• Number of length n+1 0..2*1 arrays with the sum of the absolute values of adjacent differences equal to n*1.at n=9A249975
• Practical numbers z such that z^2 = x^2 + y^2 for some practical numbers x and y with gcd(x,y,z) = 4.at n=38A294112
• Least positive integer m such that m*n divides F(m+n), where F(k) denotes the k-th Fibonacci number A000045(k).at n=9A297573