18415

Appears in sequences

• Divisors of 2^28 - 1.at n=33A003536
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 21 ones.at n=11A031789
• Sum of the first n Sophie Germain primes.at n=41A066819
• Number of binary words of length n containing at least one subword 100001 and no subwords 10^{i}1 with i<4.at n=35A143284
• Number of (n+2) X 6 0..2 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.at n=7A186563
• Number of (n+2)X10 0..2 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.at n=3A186567
• Number of (n+1) X (3+1) 0..1 arrays with no 2 X 2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements.at n=13A251123
• Number of partitions of n into 8 or more distinct parts.at n=42A347575
• Numbers k such that A360522(k) = A360522(k+1).at n=26A360527
• Triangle read by rows: Coefficients of the polynomials N(n, x) * EZ(n, x), where N denote the Narayana polynomials A131198 and EZ the Eulerian zig-zag polynomials A205497.at n=36A373431
• Triangle read by rows: Coefficients of the polynomials N(n, x) * EZ(n, x), where N denote the Narayana polynomials A131198 and EZ the Eulerian zig-zag polynomials A205497.at n=39A373431