Numbers k such that k and floor[k/3] are both squares; i.e., squares which remain squares when written in base 3 and last digit is removed.

A055793

Numbers k such that k and floor[k/3] are both squares; i.e., squares which remain squares when written in base 3 and last digit is removed.

Terms

    a(0) =0a(1) =1a(2) =4a(3) =49a(4) =676a(5) =9409a(6) =131044a(7) =1825201a(8) =25421764a(9) =354079489a(10) =4931691076a(11) =68689595569a(12) =956722646884

External references