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A054219 Concatenation of n in base 10 down to base 2 is divisible by at least one of these base b numbers, all numbers interpreted as decimals. 1
1, 2, 3, 4, 5, 8, 9, 10, 15, 16, 20, 22, 25, 38, 40, 44, 50, 55, 66, 68, 74, 75, 80, 95, 100, 110, 111, 125, 144, 175, 200, 230, 240, 250, 260, 265, 267, 268, 269, 300, 301, 316, 358, 375, 400, 440, 453, 476, 500, 514, 542, 620, 688, 875, 1000, 1096, 1120, 1250 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..58.

EXAMPLE

n=9 -> 9{10}=10{9}=11{8}=12{7}=13{6}=14{5}=21{4}=100{3}=1001{2} -> 91011121314211001001 which is divisible by 21 (from 9 in base 4).

CROSSREFS

Cf. A054220.

Sequence in context: A217349 A329574 A087278 * A337801 A116214 A161389

Adjacent sequences:  A054216 A054217 A054218 * A054220 A054221 A054222

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Feb 15 2000

STATUS

approved

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Last modified July 29 11:53 EDT 2021. Contains 346346 sequences. (Running on oeis4.)