408855776
domain: N
Appears in sequences
- a(n) = 4*a(n-1) - a(n-2) with a(0) = 0, a(1) = 1.at n=16A001353
- a(n) = 4*a(n-2) - a(n-4) for n > 1, a(n) = n for n = 0, 1.at n=32A002530
- Pisot sequence E(4,15): a(n) = floor(a(n-1)^2/a(n-2)+1/2) for n>1, a(0)=4, a(1)=15.at n=14A010905
- a(n) = 2*a(n-1)*A002812(n-1), starting a(0)=1.at n=4A071579
- Expansion of (1 + x + x^2)/(1 - 4x^2 + x^4).at n=31A108412
- Numerators b(n) of Pythagorean approximations b(n)/a(n) to sqrt(3).at n=14A195503
- Denominators of the other-side convergents to sqrt(3).at n=30A259592
- p-INVERT of the positive integers, where p(S) = 1 - 4*S^2.at n=15A290908
- Expansion of 1/((1 - x)^6 + x^6).at n=27A306940