390049
domain: N
Appears in sequences
- a(n) = 2*A000129(n) - 1.at n=14A133654
- a(n)=a(n-1)+3a(n-2)+a(n-3).at n=16A137199
- Partial sums of A193911.at n=26A193912
- Number of 2 X 2 0..n arrays with rows and columns in lexicographically nondecreasing order.at n=31A229795
- a(n) = (n^2 - n + 1)*(n^2 + n - 1).at n=24A257925
- The index of the first of two consecutive positive triangular numbers (A000217) the sum of which is equal to the sum of four consecutive positive triangular numbers.at n=6A262490