421201

Appears in sequences

• a(n) = n*(n+1)*(n+2)*(n+3)+1 = (n^2 + 3*n + 1)^2.at n=24A062938
• Squares for which both the sum of the digits and the product of the digits is a triangular number.at n=35A118490
• Squares whose largest decimal digit is 4.at n=34A277948