a(n) = [x^n] Product_{k>=1} (1 + n^n*x^k).A292306a(n) = [x^n] Product_{k>=1} (1 + n^n*x^k).Terms a(0) =1a(1) =1a(2) =4a(3) =756a(4) =65792a(5) =19534375External referencesoeis: A292306