121088881
domain: N
Appears in sequences
- a(n) = 5*a(n-1) - a(n-2), with a(1)=1, a(2)=4.at n=12A004253
- Expansion of g.f. (x^3+x^2+2*x+1)/(x^4+5*x^2+1).at n=24A101463
- Numerators in continued fraction [0; 1, 3, 1, 3, 1, 3, ...].at n=24A136210
- Denominators in continued fraction [0; 1, 3, 1, 3, 1, 3, ...].at n=23A136211
- a(n) = (a(n-1)*a(n-3) + 1) / a(n-4) with a(0) = a(1) = a(2) = a(3) = 1.at n=39A217787