A319809 Numbers k that are equal to 2*k when expressed in base 9 and then interpreted in base 10.

7794416, 7816758, 8131871, 8132006, 8152638, 8152650

Offset: 1

Author

Anton Deynega, Sep 28 2018

Keywords

• nonn
• base
• fini
• full

Examples

			8132006 expressed in base 9 is equal to 16264012; 16264012 = 2*8132006.
		

Crossrefs

Cf. A139285.

Programs

Mathematica

Select[Range[10^6, 10^7], FromDigits@ IntegerDigits[#, 9] == 2 # &] (* Michael De Vlieger, Oct 11 2018 *)

PARI

isok(n) = fromdigits(digits(n,9), 10) == 2*n; \\ Michel Marcus, Sep 28 2018