531468

Appears in sequences

• Theta series of 14-dimensional extremal 3-modular lattice with det 3^7, minimal norm 4, group 2 X G_2(3).at n=6A004048
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 54.at n=26A031732
• Given n colors, sequence gives number of ways to color the vertices of a square such that no edge has the same color on both of its vertices.at n=27A091940
• a(n) = 729*n^2 + 27.at n=27A158645
• a(n) = A215723(n) / 2^(n-1).at n=17A215897
• For successive terms of A002202, totient values t, lcm({x: phi(x)=t})/gcd({x: phi(x)=t}).at n=15A317013
• a(n) = (1 + 2)^3 + (4 + 5)^6 + (7 + 8)^9 + (10 + 11)^12 + ... + (up to n).at n=5A319391