903855

Appears in sequences

• a(n) = 3^n + 5^n + 7^n.at n=7A074552
• a(n) is the second component y of the distance vector (x,y), x >= y >= 0, between two nodes of an infinite square lattice of one-ohm resistors, such that the resistance R between the two nodes is as close as possible to n ohms, i.e., abs(R - n) is minimized. x is A356201(n).at n=5A356202