a(n) = Product_{k=0..n} (k^4 + (n-k)^4).A323542a(n) = Product_{k=0..n} (k^4 + (n-k)^4).Terms a(0) =0a(1) =1a(2) =512a(3) =1896129a(4) =14101250048External referencesoeis: A323542