Number of distinct resistances that can be produced from a circuit of n equal resistors using only series and parallel combinations.

A048211

Number of distinct resistances that can be produced from a circuit of n equal resistors using only series and parallel combinations.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =9a(4) =22a(5) =53a(6) =131a(7) =337a(8) =869a(9) =2213a(10) =5691a(11) =14517a(12) =37017a(13) =93731a(14) =237465a(15) =601093a(16) =1519815a(17) =3842575a(18) =9720769a(19) =24599577a(20) =62283535a(21) =157807915a(22) =400094029a(23) =1014905643a(24) =2576046289a(25) =6541989261a(26) =16621908599a(27) =42251728111a(28) =107445714789a(29) =273335703079

External references