A356203 a(n) is the first component x of the distance vector (x,y) in an oblique 120-degree coordinate system, 0 <= y <= x, between two nodes of an infinite triangular 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. y is A356204(n).
0, 43, 9615, 2299822, 507491696, 118805048562, 25315296119626, 5959615271620724
Offset: 0
Examples
n x y R(x,y) - n 0 0 0 0 1 43 18 5.033*10^(-6) 2 9615 2536 1.848*10^(-10) 3 2299822 1136101 -3.120*10^(-14) 4 507491696 119227930 5.751*10^(-19) 5 118805048562 33636581266 5.618*10^(-23) 6 25315296119626 1774960492720 8.406*10^(-29) 7 5959615271620724 685318499093455 2.526*10^(-32)