81923

Appears in sequences

• a(n) = K_3(n) = Sum_{k>=0} A090285(3,k)*2^k*binomial(n,k). a(n) = (4*n^3+30*n^2+56*n+15)/3.at n=37A090294
• a(n) = n! * Sum_{k=0..n} A000296(k)/k!.at n=8A113059
• Sum of all n-digit Cullen numbers.at n=4A131700
• Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 3,1,3,1,0,0,0 for x=0,1,2,3,4,5,6.at n=5A198159
• Numbers such that the sequence of all possible sums of divisors of n is increasing but not strictly so, the sums being ordered by their characteristic functions, seen as binary numbers (see example).at n=30A230492