40783083domain: NAppears in sequencesa(n) = T(2n,n), T given by A026725.at n=13A026726Greatest number in row n of array T given by A026725.at n=26A026731Sum of squares of numbers in row n of array T given by A026725.at n=13A027213Expansion of 1/(1-x-x^3*c(x^3)), c(x) the g.f. of A000108.at n=39A165407