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A062929
Numbers k that, when expressed in base 5 and then interpreted in base 7, give a multiple of k.
10
0, 1, 2, 3, 4, 3640, 7863, 7894, 8186, 11830, 18200, 39315, 39470, 40930, 59150, 2521602, 3278326, 4167678, 13196470, 17870857, 17992485, 20838390, 36724952, 58516102, 73231902, 89354285, 89962425, 105564531, 200046408, 301764432, 446771425, 449812125, 633387186
OFFSET
1,3
EXAMPLE
3640 in base 5 is 104030, which interpreted in base 7 is 18200=5*3640.
MATHEMATICA
Select[Range[0, 20*10^6], Divisible[FromDigits[IntegerDigits[#, 5], 7], #]&] (* Harvey P. Dale, Jul 18 2015 *)
KEYWORD
base,nonn
AUTHOR
Erich Friedman, Jul 21 2001
EXTENSIONS
More terms from Naohiro Nomoto, Aug 06 2001
Offset changed to 1 and a(22)-a(33) from Georg Fischer, Mar 13 2023
STATUS
approved