427859097159
domain: N
Appears in sequences
- a(n) = 7*a(n-1) - a(n-2) + 4, with a(0) = 0, a(1) = 5.at n=14A003482
- a(n) = F(n)*F(n-1) if n odd otherwise F(n)*F(n-1)-1, where F = Fibonacci numbers A000045.at n=29A059840
- Numerators b(n) of Pythagorean approximations b(n)/a(n) to 1/2.at n=28A195548
- a(n) = F(n)^2 - F(n-1)^2 or F(n+1) * F(n-2) where F(n) = A000045(n), the Fibonacci numbers.at n=29A226205
- Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 0,1 or 2,-2.at n=17A264085