62520

Appears in sequences

• a(n) = Sum_{k=m..n} T(k,n-k), where m = floor((n+1)/2); a(n) is the n-th diagonal-sum of left justified array T given by A027935.at n=28A027947
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 25.at n=9A031703
• Successively larger 3-ball 'prime' ground-state site swaps of A084521 in concatenated decimal notation.at n=32A084522
• a(n) = 3*a(n-1)-3*a(n-2)+a(n-3)+a(n-4).at n=18A138653
• Number of n X n symmetric binary matrices with each 1 adjacent to an odd number of other 1's.at n=7A140964
• a(n) = 625*n^2 + 2*n.at n=9A158382
• Triangle T(n, k) = coefficients of ( t(n, x) ) where t(n, x) = (1-x)^(n+1)*p(n, x)/x, p(n, x) = x*D( p(n-1, x) ), with p(1, x) = x/(1-x)^2, p(2, x) = x*(1+x)/(1-x)^3, and p(3, x) = x*(1+6*x+x^2)/(1-x)^4, read by rows.at n=47A166344
• Triangle T(n, k) = coefficients of ( t(n, x) ) where t(n, x) = (1-x)^(n+1)*p(n, x)/x, p(n, x) = x*D( p(n-1, x) ), with p(1, x) = x/(1-x)^2, p(2, x) = x*(1+x)/(1-x)^3, and p(3, x) = x*(1+6*x+x^2)/(1-x)^4, read by rows.at n=52A166344
• p-INVERT of the positive integers (A000027), where p(S) = 1 - S - S^2.at n=9A289780
• Irregular table read by rows: The number of k-faced polyhedra, where k>=4, created when an n-prism, formed from two n-sided regular polygons joined by n adjacent rectangles, is internally cut by all the planes defined by any three of its vertices.at n=55A338801