65268

Appears in sequences

• Number of Barlow packings with group P6(bar)m2 that repeat after 2n layers.at n=17A011949
• Twin prime averages which are also the sum of the divisors of a triangular number.at n=30A166162
• Nonsquare numbers whose sum of proper square divisors is a square greater than 1.at n=22A232555
• Numbers whose sum of proper square divisors is a square greater than 1.at n=25A232556
• a(n) = the smallest number m such that gcd(sigma(m), pod(m)) = n where sigma(k) = the sum of the divisors of k (A000203) and pod(k) = the product of the divisors of k (A007955).at n=41A324527
• Number of triangular regions in the Farey Diagram Farey(n,n), divided by 4.at n=9A358302
• a(n) = A269795(n)/2.at n=17A365162