59189

Appears in sequences

• a(n) = (7^n + 3^n)/2.at n=6A081336
• Number of pairs of intersecting diagonals in the interior and exterior of a regular n-gon.at n=26A211380
• Number of intersections of diagonals in the interior and exterior of a regular n-gon.at n=26A211383
• Numbers of the form (7^j + 9^k)/2, for j and k >= 0.at n=39A226795
• a(n) = Sum_{i=0..n} digsum_6(i)^4, where digsum_6(i) = A053827(i).at n=42A231675
• Numbers z such that x^2 + y^6 = z^2 (with positive integers x and y) and gcd(x, y, z) = 1.at n=12A293691