a(n) = n^12*(n^8+n^4+1)*(n^6-1)*(n^2-1).A037253a(n) = n^12*(n^8+n^4+1)*(n^6-1)*(n^2-1).Terms a(0) =0a(1) =0a(2) =211341312External referencesoeis: A037253