20371

Appears in sequences

• a(n) = [ 2nd elementary symmetric function of {sqrt(k)} ], k = 1,2,...,n.at n=43A025193
• Least k such that the first k terms of the Kolakoski sequence (A000002) contain n more 2's than 1's.at n=12A025503
• a(n) = floor(n^3 / Pi).at n=40A032633
• G.f. satisfies A(x) = 1 + x*cycle_index(G,A(x)) where G = cyclic group of order 29 generated by (1,2,...,29).at n=6A036734
• Position of first appearance of each integer in A088568 (number of 1's minus number of 2's in first n terms of A000002).at n=24A288605
• a(n) = index where A088568 (or equally A294448) first reaches or exceeds n in magnitude.at n=12A294449
• Triangle T(n,k) read by rows: fibonomial coefficients sums triangle.at n=51A305695
• Figurate numbers based on the small stellated dodecahedron: a(n) = n*(21*n^2 - 33*n + 14)/2.at n=12A318159
• Number of vertices in a regular drawing of a complete bipartite graph where the vertex positions on each part equal the Farey series of order n.at n=6A359690
• Expansion of 1/( Product_{k=0..7} (1 + (-1)^k * (2*k+1) * x) )^(1/8).at n=5A383625
• Number of face-connected components of rhombic pyramidal cells in the rhombic pyramidal honeycomb up to translation, rotation, and reflection of the honeycomb.at n=9A385274