79315912984
domain: N
Appears in sequences
- a(n) = 4*a(n-1) - a(n-2) with a(0) = 0, a(1) = 1.at n=20A001353
- 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=18A010905
- Numerators b(n) of Pythagorean approximations b(n)/a(n) to sqrt(3).at n=18A195503
- p-INVERT of the positive integers, where p(S) = 1 - 4*S^2.at n=19A290908