53440

Appears in sequences

• n+phi(n)+phi(phi(n)) is a cube.at n=28A116042
• Largest number that is not the sum of five n-gonal numbers.at n=39A118367
• Number of binary strings of length n with no substrings equal to 0000 0101 or 1011.at n=16A164435
• Number of n X 2 zero-sum -1..1 arrays with rows and columns lexicographically nondecreasing.at n=16A202027
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=58A301999
• Number of 4Xn 0..1 arrays with every element equal to 1, 2 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=7A302001
• Row sums of A309038.at n=16A328685
• G.f. A(x) satisfies: A(x) = 1 + x + x^3 * A(x)^2 / (1 - x).at n=19A346504