22186

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 89.at n=23A020428
• Numbers whose base-2 representation has exactly 14 runs.at n=12A043581
• Third row of Pascal-(1,2,1) array A081577.at n=17A081583
• Numbers n such that p(8n) is prime, where p(n) is the number of partitions of n.at n=30A114168
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, -1, 1), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.at n=9A149846
• Number of (n+2) X 4 binary arrays avoiding patterns 001 and 110 in rows, columns and nw-to-se diagonals.at n=21A202441
• Numbers of the form 5^j + 9^k, for j and k >= 0.at n=34A226829
• Decimal representation of the middle column of the "Rule 9" elementary cellular automaton starting with a single ON (black) cell.at n=14A266248
• Numbers k such that k-1 is a substring of k^2.at n=7A304290
• Sum of the odd parts in the partitions of n into 5 parts.at n=40A309545
• Least k such that k*A000668(n)*A000668(n+2) + 1 is prime, where A000668(n) is the n-th Mersenne prime.at n=23A365063
• a(n) = Sum_{p|n, p prime} p^phi(n/p).at n=44A369687