A338402 - OEIS

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A338402

a(n) is the denominator of the resistance R(n) = A338401(n)/a(n) of a triangular network of 3*n*(n+1)/2 one Ohm resistors in a hexagonal lattice arrangement.

3, 9, 7, 123, 1773, 21075, 68761, 4989753, 178945525, 396450465051, 144693391952079, 4833128874789907, 751463705427149325, 59315127102256318272081, 30288529373611329886681, 335082000330404529286853990499, 6485606445639875637410148108213, 7842015457241561891262053489240216057

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

For more information and example see A338401.

LINKS

Hugo Pfoertner, Table of n, a(n) for n = 1..50

CROSSREFS

Cf. A338401.

Sequence in context: A137299 A329238 A001226 * A093498 A200240 A199052

Adjacent sequences: A338399 A338400 A338401 * A338403 A338404 A338405

KEYWORD

nonn,frac

AUTHOR

Hugo Pfoertner, Oct 24 2020

STATUS

approved