26766

Appears in sequences

• Numbers k such that sigma(k) = sigma(k+9).at n=5A015877
• Poincaré series [or Poincare series] for depths of roots in a certain root system.at n=21A019528
• Number of products of distinct primes <= prime(n) equal to -1 (mod prime(n)).at n=21A024404
• Number of (n+2) X (4+2) 0..2 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=6A252857
• Number of (n+2)X(7+2) 0..2 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=3A252860
• Numbers k such that (10^k - 13)/3 is prime.at n=19A280017
• G.f. A(x) satisfies: [x^(n-1)] (1 + x*A(x)^n)^n / A(x)^n = 0 for n>1.at n=6A303063