A062922 Numbers k that, when expressed in base 4 and then interpreted in base 7, give a multiple of k.
0, 1, 2, 3, 33, 219, 840, 1055, 4220, 16880, 95322, 178500, 714000, 981540, 1387680, 7676775, 7924262, 12418476, 12419535, 16552116, 19188717, 44591130, 66079524, 77842213, 178364520, 294607851, 363167196, 610436322, 823488858, 950204780
Offset: 1
Examples
33 in base 4 is 201, which interpreted in base 7 is 99 = 3*33.
Programs
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Mathematica
Select[Range[0,20*10^6],Divisible[FromDigits[IntegerDigits[#,4],7],#]&] (* Harvey P. Dale, Nov 22 2015 *)
Extensions
More terms from Naohiro Nomoto, Aug 06 2001
Offset changed to 1 and a(22)-a(30) from Georg Fischer, Mar 13 2023