53382

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 22.at n=20A031700
• a(1) = 1; a(n+1) = sum of terms in continued fraction for sum of continued fractions, [a(n); a(n-1), a(n-2),...,a(1)] and [0; a(n), a(n-1), a(n-2),...,a(1)].at n=17A058083
• a(n) = Sum_{k=1..(p-1)*(p-2)} floor((k*p)^(1/3)) where p is the n-th prime.at n=13A078838
• Numbers n such that in the 3 X 3 square arrangement of the 9 primes p(n),..,p(n+8), totals of 3 rows and 3 columns, are all prime.at n=4A115050
• Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 4,1 5,1 polyhexes in any orientation on a planar nXnXn triangular grid.at n=7A155296
• a(n) = 441*n^2 + 21.at n=11A158603
• a(n) = 121*n^2 + n.at n=20A173267
• Numbers n such that the sum of the distinct prime divisors of n that are congruent to 1 mod 4 equals the sum of the distinct prime divisors congruent to 3 mod 4.at n=31A215949
• Numbers n such that n^32+1 and (n+2)^32+1 are both prime.at n=18A217992
• Number of set partitions T'_t(n) of {1,2,...,t} into exactly n parts, with an even number of elements in each part distinguished by marks, and such that no part contains both 1 and t with 1 unmarked or both i and i+1 with i+1 unmarked for some i with 1 <= i < t; triangle T'_t(n), t>=0, 0<=n<=t, read by rows.at n=50A261318
• Numbers of the form A000217(n)*A007494(n) that are divisible by 3.at n=34A295867
• Numbers k such that A360331(k) = A360331(k+1).at n=22A360359
• Composite squarefree integers for which the sum of the squares of their factors is a square.at n=30A379780