223261

Appears in sequences

• Numerator of 1/3 + 3/5 + 5/7 + ... + (2n - 1)/(2n + 1).at n=7A061484
• sigma(n)-phi(n) and sigma(n)+phi(n) are two palindromes greater than 2.at n=9A116031
• a(1) = 1, then a(n) is the least integer > a(n-1) such that n is the maximum element in the continued fraction for 1/a(1) + 1/a(2) + ... + 1/a(n).at n=37A174604
• Number of nX5 0..1 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=4A279463
• T(n,k)=Number of nXk 0..1 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=40A279466