Number of different resistances that can be obtained by combining n one-ohm resistors.

A180414

Number of different resistances that can be obtained by combining n one-ohm resistors.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =36a(6) =80a(7) =194a(8) =506a(9) =1400a(10) =4039a(11) =12044a(12) =36406a(13) =111324a(14) =342447a(15) =1064835a(16) =3341434a(17) =10583931a(18) =33728050a(19) =107931849a(20) =346616201

External references