72896

Appears in sequences

• Numbers k such that (k+1)*phi(k) is a perfect square.at n=29A069952
• Expansion of (1 - 2*x - sqrt(1 - 4*x - 4*x^2))/(4*x^2).at n=9A071356
• A convolution triangle of numbers based on A071356.at n=45A110681
• 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, -1, 0), (-1, 1, 1), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.at n=8A150972
• Number of partitions of n such that some part is a sum of two or more other parts.at n=44A237668
• Number of partitions p of n such that (number of numbers of the form 3k in p) is a part of p.at n=46A241546
• Numbers x = concat(a,b) such that a^b ends with the digits of x.at n=6A273383
• Square array T(n,k), n>=0, k>=0, read by antidiagonals, where T(0,k) = 1 and T(n,k) = (1/n) * Sum_{j=1..n} 2^(n-j) * binomial(n,j) * binomial(n+(k-1)*j,j-1) for n > 0.at n=65A336707