165308
domain: N
Appears in sequences
- Even elements to the right of the central elements of the 5-Pascal triangle A028313.at n=32A028321
- a(n) = (3*n+4)*binomial(n+7, 7)/4.at n=10A054487
- Number of orbits of length n under the map whose periodic points are counted by A001643.at n=24A060168
- a(n) = Fibonacci(n) * Catalan(n).at n=9A119694
- Exponents f(n), n = 1, 2, ..., in the infinite product 1 - z - z^2 - z^3 = Product_{n>=1} (1-z^n)^f(n).at n=24A125951
- a(n) = binomial(2n, n) + binomial(2n-1, n-1) + binomial(2n+1, n).at n=9A184937
- Number of (w,x,y,z) with all terms in {1,...,n} and w<=2x and y>=3z.at n=34A212515