53038

Appears in sequences

• Cumulative sum of absolute values of coefficients of q^(2n) in the series expansion of Ramanujan's mock theta function f(q).at n=42A109471
• Number of 4-step E, S, NW and NE-moving king's tours on an n X n board summed over all starting positions.at n=31A187587
• Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-3.at n=6A211959
• T(n,k)=Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-k-1.at n=34A211963
• Number of compositions of n in which the minimal multiplicity of parts equals 1.at n=16A244164
• Number of partitions of 2n whose Ferrers-Young diagram cannot be tiled with dominoes.at n=24A304710
• Number of quadrilateral regions into which a figure made up of a row of n adjacent congruent rectangles is divided upon drawing diagonals of all possible rectangles.at n=27A324043
• a(n) = Sum_{i=1..n} sigma(i)*sigma(i+1), where sigma(n) = A000203(n) is the sum of the divisors of n.at n=38A330322
• Number of oriented series-parallel networks with n elements and without unit elements in parallel.at n=15A339156