33554436domain: NAppears in sequencesa(n) = n_{2^n}.at n=23A122624a(n) = 2^n + 4.at n=25A140504a(0) = 4; for n >= 1, a(n) = 2^n + 4.at n=25A146528Number of fundamentally different graceful labelings of the complete tripartite graph K_{1,1,n}.at n=25A339891