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A062943 When expressed in base 7 and then interpreted in base 9, is a multiple of the original number. 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

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

LINKS

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

Dimiter Skordev, Python script

EXAMPLE

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

MATHEMATICA

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

CROSSREFS

Cf. A032549.

Sequence in context: A073788 A326315 A004879 * A004890 A153678 A004901

Adjacent sequences:  A062940 A062941 A062942 * A062944 A062945 A062946

KEYWORD

base,nonn

AUTHOR

Erich Friedman, Jul 21 2001

EXTENSIONS

More terms from Naohiro Nomoto, Aug 07 2001

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

STATUS

approved

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Last modified September 22 07:34 EDT 2020. Contains 337289 sequences. (Running on oeis4.)