1953123

Appears in sequences

• a(n) = 2*(-1)^n - (-5)^n.at n=9A081628
• Numbers, a(n) where binomial(a(n), 5n-1) == 0 (mod 5) and binomial(a(n), k) != 0 (mod 5) for k != 5n - 1.at n=31A224251