20164

Appears in sequences

• a(n) = (5*n + 2)^2.at n=28A016874
• a(n) = (6*n + 4)^2.at n=23A016958
• a(n) = (7*n+2)^2.at n=20A017006
• a(n) = (8*n+6)^2.at n=17A017138
• a(n) = (9*n + 7)^2.at n=15A017246
• a(n) = (10*n + 2)^2.at n=14A017294
• a(n) = (11*n + 10)^2.at n=12A017510
• a(n) = (12*n+10)^2.at n=11A017642
• Squares k^2 in which the digits of k appear.at n=29A029773
• Squares with initial digit '2'.at n=14A045785
• Numbers k such that the sum of cubes of divisors of k and the sum of 4th powers of divisors of k are relatively prime.at n=41A046685
• Numerators of convergents to A058914.at n=24A048817
• Squares with digital root 4.at n=31A061100
• A B_2 sequence: a(n) is the smallest square such that pairwise sums of not necessarily distinct elements are all distinct.at n=43A062295
• Squares that are the concatenation of three numbers, one of which is the sum of the other two.at n=5A062555
• Numbers k such that 100k+1, 100k+3, 100k+7, 100k+9 are all primes.at n=28A064687
• Smallest n-digit square starting with 2.at n=3A067472
• Number of subsets of {1,2,3,...,n} that sum to 0 mod 13.at n=18A068034
• Numbers k such that tau(k) - tau(k+1) = 1.at n=25A068208
• a(n) = 4*prime(n)^2.at n=19A069262