32626

Appears in sequences

• a(n) = number of (s(0),s(1),...,s(n)) such that every s(i) is a nonnegative integer, s(0) = 1, s(n) = 3, |s(1) - s(0)| = 1, |s(i) - s(i-1)| <= 1 for i >= 2. Also a(n) = T(n,n-2), where T is the array in A026120.at n=10A026124
• a(n)=Sum{T(n,j): j=1,2,...,n}, array T given by A048212.at n=34A048222
• a(n) = 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), starting with a(1) = 1 and a(2) = a(3) = 2.at n=33A050047
• Coefficient of x in the reduction by x^2 -> x+1 of the polynomial p(n,x) defined at Comments.at n=19A192968
• Ulam numbers u such that 5*u is also an Ulam number.at n=37A287613
• Numbers k whose binary expansion starts with the concatenation of the binary expansions of the run lengths in binary expansion of k.at n=31A348111