42489

Appears in sequences

• Sum{T(n-k,k)}, 0<=k<=[ n/2 ], where T is the array in A026386.at n=19A026397
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (0, 0, 1), (1, -1, 0), (1, 1, -1), (1, 1, 0)}.at n=8A150609
• A (1,1) Somos-4 sequence.at n=12A174017
• Expansion of A(x) = [ Sum_{n>=0} 2^(n*(n-1)/2) * (1 + 2^(2*n+1))/3 * x^(n*(n+1)/2) ]^(1/3).at n=11A370016