26154
domain: N
Appears in sequences
- Pisot sequence E(4,14): a(n) = floor(a(n-1)^2/a(n-2)+1/2) for n>1, a(0)=4, a(1)=14.at n=7A010904
- Number of 5-tuples of different integers from [ 2,n ] with no common factors among pairs.at n=40A015699
- Values of n such that n^a-+a are primes, a=5.at n=27A155021
- Number of ways to choose 3 points in an n X n X n triangular grid so that they do not form a 2 X 2 X 2 triangle.at n=8A234250
- Number of (n+1)X(7+1) 0..1 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements.at n=0A250972
- T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements.at n=21A250973
- T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements.at n=27A250973
- a(n) is the number of regions formed by n-secting the angles of a nonagon (enneagon).at n=39A335781