65715

Appears in sequences

• Number of paths in the plane x >= 0 and y >= -2, from (0,0) to (n,0), and consisting of steps U = (1,1), D = (1,-1) and H = (1,0).at n=12A026325
• a(n) is the sum of squares of numbers in row n of array T given by A026323.at n=6A027314
• a(n) is equal to the number of positive integers m less than or equal to 10^n such that m is not divisible by the prime 3 and is not divisible by at least one of the primes 2, 5 and 7.at n=3A128952
• 1-sequence of reduction of (3n-2) by x^2 -> x+1.at n=15A192312
• Number of length 1+4 0..n arrays with no consecutive five elements summing to more than 2*n.at n=10A241937
• Number of unlabeled rooted trees with n vertices such that every branch of the root has a different number of leaves.at n=14A298535
• Indices of primes in A266891.at n=33A304210
• Number of distinct lines passing through exactly two points in a triangular grid of side n.at n=34A362014