2403786672domain: NAppears in sequencesa(n)=Sum{T(2i,n-2i): i=0,1,...,[ n/2 ]}, array T as in A049600.at n=24A049601Number of positive rational knots with 2n+1 crossings.at n=23A051450A fourth-order linear divisibility sequence related to the Fibonacci numbers: a(n) = (1/2)*Fibonacci(3*n)*Lucas(n).at n=11A238536