75981domain: NAppears in sequencesExpansion of (1-x)^(-1)/(1+2*x^2+2*x^3).at n=24A077895Meandric numbers for a river crossing up to 7 parallel roads at n points.at n=13A208453a(0) = 1; a(n) = Sum_{k=0..n-1} (k+1) * binomial(k+4,4) * binomial(n-1,k) * a(k) * a(n-1-k).at n=4A385981