A355588 - OEIS

A355588

T(j,k) are the denominators v in the representation R = s/t + (2*sqrt(3)/Pi)*u/v of the resistance between two nodes separated by the distance (j,k) in an infinite triangular lattice of one-ohm resistors, where T(j,k), j >= 0, 0 <= k <= floor(j/2) is an irregular triangle read by rows.

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 5, 5, 5, 5, 5, 5, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 7, 35, 7, 35, 35, 7, 35, 35, 35, 35, 35, 55, 385, 385, 385, 55, 55, 385, 11, 55, 385, 385, 385, 385, 55, 5005, 455, 5005, 5005, 455, 5005, 5005, 5005, 5005, 5005, 5005, 5005, 5005, 1001, 143, 1001

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OFFSET

0,13

COMMENTS

See A355585 for more information.

LINKS

Table of n, a(n) for n=0..71.

EXAMPLE

The triangle begins:

1, 1;

1, 1, 1;

5, 5, 5, 5;