23985

Appears in sequences

• Numbers n such that n is a substring of its square in base 6 (written in base 10).at n=41A018830
• Position of first repeat of the opening sequence of length n occurring after the first repeat of the opening sequence of length n-1 in the Kolakoski sequence (A000002).at n=37A074300
• Potential magic constants of 9 X 9 magic squares composed of consecutive primes.at n=40A191679
• a(n) is the least value of k such that the decimal expansion of n^k contains nine consecutive identical digits.at n=32A217164
• a(n) = 2*p(n)*p(n+2) - p(n+1)^2 where p(k) = k-th prime.at n=34A324795
• a(n) is the constant term in expansion of Product_{k=1..n} (x^(k^2) + 1 + 1/x^(k^2))^2.at n=7A369389