390629

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=25A057781
• a(n) = 5^n + 4.at n=8A242329
• Expansion of Product_{k>=1} (1 + x^k)^(k*((k-2)^2+k)/2).at n=15A294959