A062922 - OEIS

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

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OFFSET

1,3

LINKS

Table of n, a(n) for n=1..30.

EXAMPLE

33 in base 4 is 201, which interpreted in base 7 is 99 = 3*33.

MATHEMATICA

Select[Range[0, 20*10^6], Divisible[FromDigits[IntegerDigits[#, 4], 7], #]&] (* Harvey P. Dale, Nov 22 2015 *)

CROSSREFS

Sequence in context: A376557 A083785 A046487 * A080471 A023184 A114229

Adjacent sequences: A062919 A062920 A062921 * A062923 A062924 A062925

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(30) from Georg Fischer, Mar 13 2023

STATUS

approved