a(n) and floor(a(n)/6) are both squares; i.e., squares that remain squares when written in base 6 and last digit is removed.

A055851

a(n) and floor(a(n)/6) are both squares; i.e., squares that remain squares when written in base 6 and last digit is removed.

Terms

    a(0) =0a(1) =1a(2) =4a(3) =9a(4) =25a(5) =100a(6) =729a(7) =2401a(8) =9604a(9) =71289a(10) =235225a(11) =940900a(12) =6985449a(13) =23049601a(14) =92198404a(15) =684502569a(16) =2258625625a(17) =9034502500a(18) =67074266169a(19) =221322261601a(20) =885289046404

External references