20775

Appears in sequences

• Sums of 7 distinct powers of 3.at n=42A038469
• a(1) = 1; for n>1, a(n) = the smallest number p > a(n-1) such that (a(n-1)+p)/2 is a cube.at n=26A126950
• A diagonal of the triangle A128080 of coefficients of q in the q-analog of the odd double factorials: a(n) = A128080(n+1,n).at n=9A128082
• Number of reduced words of length n in the Weyl group A_49.at n=3A161694
• Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 5 or 8 king-move adjacent elements, with upper left element zero.at n=9A298723
• Expansion of Product_{k>=1} (1 + (x*(1 - x))^k).at n=26A307501
• a(n) = Sum_{1 <= x_1 <= x_2 <= x_3 <= x_4 <= n} gcd(x_1, x_2, x_3 , x_4, n).at n=24A343518
• a(n) is the number of regions into which three-dimensional Euclidean space is divided by n-1 planes parallel to each face of a regular tetrahedron with edge length n, dividing the edges into unit segments.at n=17A364401