196249

Appears in sequences

• a(n) = (12*n + 11)^2.at n=36A017654
• Smallest nontrivial extension of n-th square which is a square not ending 00.at n=13A030688
• Numbers n such that sigma(d(n^3))==d(sigma(n^2)), where d(n) is the number of divisors of n.at n=32A063797
• Numbers k such that sigma(k)*phi(k) is squarefree.at n=35A065299
• Numbers k such that sigma_4(k)/sigma_2(k) is prime.at n=23A066109
• Smallest composite k such that phi(k) > k*(1-1/n^2).at n=20A069639
• Least square s such that A078142(s) is equal to the n-th prime.at n=12A076830
• Squares sandwiched between two numbers divisible by squares.at n=29A088068
• Primes squared of the form k + prime(k).at n=9A104935
• Squares of the form 5p - 6, where p is prime.at n=23A110481
• Squares of the form 6p+7 for p prime (A110015) that are squares of a prime.at n=35A110586
• Numbers whose Matula tree is a binary tree (i.e., root has degree 2 and all nodes except root and leaves have degree 3).at n=29A111299
• Numbers k of the form q^2, q = prime, such that k-2 is a prime.at n=30A146981
• Squares that becomes a prime number when prefixed with a 9.at n=28A167724
• Number of compositions of n such that the greatest part is divisible by the number of parts.at n=24A171632
• Squares k such that, if k has d digits, k has at least one digit in common with every other d-digit square.at n=10A173943
• Square numbers with at least one digit in common with any other positive square number.at n=6A182657
• The numbers n^2 as n runs through the numbers which are palindromes in base 2.at n=42A192775
• Number of (w,x,y,z) with all terms in {0,...,n} and even range.at n=24A212889
• Numbers n such that (the sum of the divisors of n) plus (the sum of the squares of the divisors of n) plus (the sum of the cubes of the divisors of n) is a prime number.at n=16A220586