%I
%S 7794416,7816758,8131871,8132006,8152638,8152650
%N Numbers k that are equal to 2*k when expressed in base 9 and then interpreted in base 10.
%e 8132006 expressed in base 9 is equal to 16264012; 16264012 = 2*8132006.
%t Select[Range[10^6, 10^7], FromDigits@ IntegerDigits[#, 9] == 2 # &] (* _Michael De Vlieger_, Oct 11 2018 *)
%o (PARI) isok(n) = fromdigits(digits(n,9), 10) == 2*n; \\ _Michel Marcus_, Sep 28 2018
%Y Cf. A139285.
%K nonn,base,fini,full
%O 1,1
%A _Anton Deynega_, Sep 28 2018
