1205400domain: NAppears in sequencesTriangle T(n,k) represents the coefficients of (x^12*d/dx)^n, where n>=1; generalization of Stirling numbers of second kind A008277, Lah-numbers A008297.at n=24A223514p-INVERT of the positive integers, where p(S) = 1 - 5*S^2.at n=10A290909