login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A234314 Let x(0)x(1)x(2)... x(q) denote the decimal expansion of n. Sequence lists the numbers n such that the suffix of decimal expansion x(1)x(2)... x(q) is the x(0)-th divisor of n. 1
11, 22, 25, 101, 202, 205, 304, 410, 425, 620, 735, 816, 832, 850, 975, 1001, 2002, 2005, 3004, 4010, 5025, 5125, 7035, 7175, 8016, 9024, 9036, 9040, 9075, 10001, 20002, 20005, 30004, 30025, 40010, 50008, 60016, 60020, 60050, 70625, 80010, 80016, 80128, 90036 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..44.

EXAMPLE

735 is in the sequence because the divisors of 735 are {1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735} and 35 is the 7th divisor of 735.

MAPLE

with(numtheory):for n from 1 to 100000 do:x:=convert(n, base, 10):n1:=nops(x):y:=divisors(n):n2:=nops(y):a:=x[n1]: s:=sum('x[i]*10^(i-1) ', 'i'=1..n1-1):if n2>a and y[a]=s then printf(`%d, `, n):else fi:od:

CROSSREFS

Cf. A234315.

Sequence in context: A095779 A062055 A066500 * A258738 A160272 A164006

Adjacent sequences:  A234311 A234312 A234313 * A234315 A234316 A234317

KEYWORD

nonn,base

AUTHOR

Michel Lagneau, Dec 23 2013

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 19 18:39 EST 2019. Contains 329323 sequences. (Running on oeis4.)