154505

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 27.at n=26A031615
• a(n)*a(n-13) = a(n-1)*a(n-12)+a(n-6)+a(n-7) with initial terms a(1)=...=a(13)=1.at n=41A133854
• Number of (n+2) X 5 0..1 matrices with each 3 X 3 subblock idempotent.at n=21A224554