30126

Appears in sequences

• The middle coefficient in the minimal polynomial for (2*cos(Pi/15))^n.at n=7A306611
• Array of coefficients of the minimal polynomial of (2*cos(Pi/15))^n, for n >= 1 (ascending powers).at n=37A307886
• Number of non-isomorphic set-systems of weight n with at least one singleton.at n=13A330053
• a(n) is the least k such that A345468(k) = 2*n-1.at n=38A345469
• Numbers k such that A322582(k) <= A276086(k) <= A348507(k).at n=41A392602