385200

Appears in sequences

• Number of (w,x,y,z) with all terms in {1,...,n} and |x-y|<|y-z|.at n=30A212681
• Number of n X n 0..4 arrays with some element plus some horizontally or vertically adjacent neighbor totalling four exactly once.at n=2A270051
• Number of nX3 0..4 arrays with some element plus some horizontally or vertically adjacent neighbor totalling four exactly once.at n=2A270053
• T(n,k)=Number of nXk 0..4 arrays with some element plus some horizontally or vertically adjacent neighbor totalling four exactly once.at n=12A270058
• Expansion of (2*x+1)*(1-x) / ( 1-2*x-4*x^2+6*x^3 ).at n=13A271893
• Coreful triperfect numbers: numbers k such that csigma(k) = 3*k, where csigma(k) is the sum of the coreful divisors of k (A057723).at n=31A364990