109561

Appears in sequences

• a(n) = (10*n + 1)^2.at n=33A017282
• a(n) = (12*n + 7)^2.at n=27A017606
• Strong pseudoprimes to base 18.at n=34A020244
• Strong pseudoprimes to base 71.at n=28A020297
• Smallest square containing n-th prime as substring.at n=28A029945
• Smallest extension of n-th prime which is a square.at n=28A030671
• Powers of a prime lucky number (A031157) but excluding lucky numbers (A000959).at n=25A057609
• Squares the sum of the squares of whose digits are squares.at n=20A061090
• Numbers n such that sigma(d(n^3))==d(sigma(n^2)), where d(n) is the number of divisors of n.at n=24A063797
• Squares which when reversed are primes (ignore leading zeros).at n=33A068989
• Smallest composite k such that phi(k) > k*(1-1/n^2).at n=17A069639
• Squares arising in A085039. n-th partial sum of A085039.at n=20A085040
• Squares of primes of the form 4*k+3.at n=34A087691
• Perfect powers whose digit reversal is prime.at n=36A088112
• Smallest square with Hamming weight n (i.e., with exactly n 1's when written in binary).at n=12A089998
• Squares of A006450: a(n) = prime(prime(n))^2.at n=18A092769
• a(n) is the square of near-repdigit number A033175(n).at n=2A098207
• Primes squared of the form k + prime(k).at n=8A104935
• Squares of the form n+prime(n).at n=33A104992
• Squares of the form 2*p+3 that are squares of primes.at n=30A110588