288968

Appears in sequences

• Number of (n+5)X(n+5) 0..1 matrices with each 6X6 subblock idempotent.at n=17A224569
• a(n) is the least number k greater than n such that the square roots of both k and n have continuous fractions with the same period p and, if p > 1, the same periodic terms except for the last term.at n=42A334116