137228domain: NAppears in sequencesNumber of indecomposable binary [ n,4 ] codes without 0 columns.at n=20A034351Numerators of continued fraction convergents to sqrt(817).at n=10A042576Expansion of g.f. A(x) satisfying A(x) = Sum_{n>=0} d^n/dx^n x^(4*n) * A(x)^(2*n) / n!.at n=4A361542