146280

Appears in sequences

• a(n) = n*(n+1)*(n^2+1)/2.at n=23A071237
• Smallest a(n) > a(n-1) such that a(n)^2+a(n-1)^2 is a perfect square, with a(1)=5.at n=36A076671
• Smallest a(n)>a(n-1) such that a(n)^2+a(n-1)^2 is a perfect square, a(1)=9.at n=36A076674
• Number of nondecreasing integer sequences of length 24 with sum zero and sum of absolute values 2n.at n=17A158158
• Number of vertices in a regular 2n-gon when all vertices are connect by straight lines except for the n lines joining diametrically opposite vertices.at n=22A368814