77857

Appears in sequences

• a(n) = a(n-1) + a(n-3), with a(0) = a(1) = 1, a(2) = 5.at n=28A011761
• Sum of the products of the first n prime pairs.at n=15A135232
• 1000-gonal numbers: a(n) = n*(499*n - 498).at n=13A195163
• Number of n X 2 0..1 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with new values introduced in order 0 sequentially upwards.at n=11A279378