107185

Appears in sequences

• Numbers that are the sum of 2 nonzero squares in exactly 8 ways.at n=27A025291
• Numbers that are the sum of 2 nonzero squares in 7 or more ways.at n=30A025298
• Numbers that are the sum of 2 nonzero squares in 8 or more ways.at n=29A025299
• Numbers that are the sum of 2 distinct nonzero squares in exactly 8 ways.at n=27A025309
• Numbers that are the sum of 2 distinct nonzero squares in 7 or more ways.at n=30A025317
• Numbers that are the sum of 2 distinct nonzero squares in 8 or more ways.at n=29A025318
• Pseudoprimes to both base 2 and base 3, i.e., intersection of A001567 and A005935.at n=25A052155
• a(n) = n^4/2 - n^3 + 3*n^2/2 - n + 1 = (n^2 + 1)*(n^2 - 2*n + 2)/2.at n=22A058919
• Numbers k that are the hypotenuse of exactly 40 distinct integer-sided right triangles, i.e., k^2 can be written as a sum of two squares in 40 ways.at n=17A097282
• Pseudotwinprimes p+2 for primes p such that p+2 divides p^(p+2)+2 and p+2 is composite.at n=30A100873
• Pseudoprimes (base-2) equal to product of 4 primes not necessarily distinct.at n=11A112441
• Numbers m such that k = m*23^2 divides 3^(k-1) - 2^(k-1).at n=27A130058
• Composite numbers k such that 2^k-2 and 3^k-3 are both divisible by k and k is not a Carmichael number (A002997).at n=10A153513
• Numbers m such that exactly half of the a such that 0<a<m and (a,m)=1 satisfy a^(m-1) == 1 (mod m).at n=23A191311
• Numbers in A191311 but not in A129521.at n=10A191592
• Pseudoprimes divisible by a smaller pseudoprime.at n=7A215150
• Fermat pseudoprimes to base 2 of the form m*n^2 + (11*m - 23)*n + 19*m - 49, where m, n >= 0.at n=34A215326
• Fermat pseudoprimes to base 2 divisible by 5.at n=16A216023
• Composite integers k such that 2^k == 2 (mod k*(k+1)).at n=21A217465
• Fermat pseudoprimes to base 2 which are not Euler pseudoprimes to base 2.at n=35A227136