25753389181domain: NAppears in sequencesBisection of A000930.at n=32A002478Expansion of (1-x)/(1-4*x+3*x^2-x^3).at n=21A124820a(n) = A000930(n^2), where A000930 is Narayana's cows sequence.at n=8A231620a(n) = Sum_{k=0..2*n} binomial(2*k,2*n-k).at n=16A391594