456980

Appears in sequences

• a(n) = n^4+4 = (n^2-2*n+2)*(n^2+2*n+2) = ((n-1)^2+1)*((n+1)^2+1).at n=26A057781
• a(n) = 16*n^4 + 4.at n=13A222655
• a(n) is the number of ways to place non-attacking knights on a 3 X n chessboard.at n=10A321251