A062943 When expressed in base 7 and then interpreted in base 9, is a multiple of the original number.

0, 1, 2, 3, 4, 5, 6, 426, 428, 452, 880, 906, 932, 1360, 7687134, 53809938, 2571412221, 2582875882, 5016909933, 5154289245, 7736157463, 7748731389, 39728612701, 109634280128, 116779253264, 198109784526, 233617301990, 480974817878, 1011847148845, 1432434922737

Offset: 1

Author

Erich Friedman, Jul 21 2001

Keywords

• base
• nonn

Comments

The terms I added (including those in the b-file) are all the remaining ones < 10^30. They have been computed by essentially using ideas from Giovanni Resta. - Dimiter Skordev, Jan 26 2020

Examples

			426 in base 7 is 1146, which interpreted in base 9 is 852=2*426.
		

Links

• Dimiter Skordev, Table of n, a(n) for n = 1..103
• Dimiter Skordev, Python script

Crossrefs

Cf. A032549.

Programs

Mathematica

Join[{0},Select[Range[1400],Divisible[FromDigits[IntegerDigits[#,7],9],#]&]] (* Harvey P. Dale, Mar 29 2012 *)

Extensions

More terms from Naohiro Nomoto, Aug 07 2001

a(16) and beyond from Dimiter Skordev, Jan 25 2020