A sequence used in the touching circle problem described in A247512.

A246643

A sequence used in the touching circle problem described in A247512.

Terms

    a(0) =1a(1) =10a(2) =121a(3) =1690a(4) =25921a(5) =420250a(6) =7027801a(7) =119508490a(8) =2050368961a(9) =35341836010a(10) =610665665401

External references