568345
domain: N
Appears in sequences
- a(n) = 6*a(n-1) - a(n-2) - 2 with a(0) = 1, a(1) = 3.at n=8A011900
- Expansion of (1-3*x) / (1-5*x-5*x^2+x^3).at n=8A108475
- a(2n) = A011900(n), a(2n+1) = A001109(n+1).at n=16A113225
- Expansion of (1-x)/((1-x)^2 - x^2*(1+x)^2).at n=16A116404
- Positive numbers y such that y^2 is of the form x^2+(x+577)^2 with integer x.at n=13A159626
- Numbers k such that k!/m! is a triangular number for some m < k-1.at n=14A227026