40615
domain: N
Appears in sequences
- a(n) = T(2*n, n+3), T given by A027011.at n=5A027014
- a(n) = greatest number in row n of array T given by A027011.at n=16A027020
- T(n, 2n-9), T given by A027960.at n=11A027971
- a(n) = greatest number in row n of array T given by A027960.at n=16A027977
- Column 2 of triangle A055907.at n=37A055908
- Numbers k such that sigma(k) - k - 1 is a perfect number.at n=10A293992
- a(1) = 0 and a(n+1) > a(n) is the smallest integer such that a(n+1)^2-a(n)^2 is triangular.at n=22A358416