123201

Appears in sequences

• Sum of first n cubes; or n-th triangular number squared.at n=26A000537
• Squares of odd triangular numbers.at n=13A014736
• a(n) = (9*n)^2.at n=39A017162
• a(n) = (10*n + 1)^2.at n=35A017282
• a(n) = (11*n + 10)^2.at n=31A017510
• a(n) = (12*n + 3)^2.at n=29A017558
• Squares that are a difference between 2 positive cubes.at n=8A038596
• Numbers n such that A048767(n) = n.at n=42A048768
• Numbers n such that the square root of n is an integer and a multiple of the sum of the digits of n.at n=34A067521
• Sum of factorials of digits of n equals the largest prime factor of n.at n=24A074257
• Numbers k having exactly one divisor d such that in binary representation d and k/d have the same number of 1's as k.at n=17A080026
• Numbers of the form (3^i)*(13^j).at n=32A107364
• "Binary prime squares": squares whose binary expansions, read as decimal expansions, are primes.at n=14A108324
• Numbers of the form (9^i)*(13^j), with i, j >= 0.at n=17A108748
• Squares of the form 2*prime(n) - prime(n+1).at n=35A110970
• For each successive prime p, the largest integer n such that both n and n-1 factor into primes less than or equal to p.at n=5A117581
• Squares for which the sum of the digits, the product of the digits, the digital root and the multiplicative digital root are all squares.at n=25A117680
• Row sums of (denominator) triangle A119948.at n=8A119950
• a(n) = A000931(n)^2.at n=27A133037
• a(n) = (14*n+1)^2.at n=25A134934