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 A338600 a(n) is the common denominator of the A338197(n) rational resistance values that can be obtained from a network of exactly n one-ohm resistors, but not by a network of fewer than n one-ohm resistors. 14
 1, 2, 6, 60, 840, 360360, 232792560, 5342931457063200, 591133442051411133755680800, 79057815923102180093748328364591874435251553600 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The next terms a(11)=8.87124454467...*10^84 and a(12)=1.80685581583...*10^141 are too big to be included in the data. LINKS Hugo Pfoertner, Table of n, a(n) for n = 1..15 EXAMPLE a(4) = 60: The resistance values for which a minimum of 4 resistors is needed are [1/4, 2/5, 3/5, 3/4, 4/3, 5/3, 5/2, 4] with a common denominator of 60. a(1) = 1: [1], a(2) = 2: [1/2, 2], a(3) = 6: [1/3, 2/3, 3/2, 3]. CROSSREFS Cf. A048211, A051389, A180414, A337517, A338197, A338580, A338590, A338595, A338596, A338597, A338598, A338599, A338605, A338606, A338607, A338608, A338609. Sequence in context: A156972 A086332 A180402 * A089039 A156451 A152617 Adjacent sequences: A338597 A338598 A338599 * A338601 A338602 A338603 KEYWORD nonn AUTHOR Hugo Pfoertner, Nov 03 2020 STATUS approved

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Last modified November 30 18:14 EST 2023. Contains 367461 sequences. (Running on oeis4.)