50358

Appears in sequences

• a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) and p is the unique integer such that 2^p < n-1 <= 2^(p+1), with a(1) = a(2) = 1 and a(3) = 2.at n=15A049939
• Triangle read by rows: T(n, k) = Sum_{j=0..n} C(j, n-k) * C(j, k) * (-1)^(n - j).at n=60A176331
• Central coefficients T(2n,n) of number triangle A176331.at n=5A176335
• a(n) = number of integers in range [2^(n-1),(2^n)-1] which permutation A209861/A209862 sends to even-sized orbits.at n=17A209868
• a(n) = 3*a(n-1) + 46*a(n-2) + a(n-3) with a(0)=0, a(1)=14, a(2)=49.at n=5A215569
• Triangle read by rows, Bell transform of Bell numbers.at n=49A264428
• Smallest squarefree term of adjacent squarefree pairs in the sequence of practical numbers (A005153).at n=3A268156
• Number of integers in n-th generation of tree T(-2/3) defined in Comments.at n=38A274150