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
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