

A356204


a(n) is the second component y of the distance vector (x,y) in an oblique 120degree coordinate system, 0 <= y <= x, between two nodes of an infinite triangular lattice of oneohm 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 A356203(n).


2




OFFSET

0,2


LINKS

Table of n, a(n) for n=0..7.


EXAMPLE

See table in A356203.


CROSSREFS

Cf. A355585, A355586, A355587, A355588, A355589, A355954.
Cf. A356201, A356202 (similar for square lattice).
Sequence in context: A282830 A174637 A267065 * A243215 A162449 A318297
Adjacent sequences: A356201 A356202 A356203 * A356205 A356206 A356207


KEYWORD

nonn,hard,more


AUTHOR

Hugo Pfoertner, Aug 13 2022


STATUS

approved



