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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A245386 Numbers in A245385 where P, Q, R, and S are all distinct. 2
164, 195, 265, 498, 1664, 1995, 2665, 4847, 4998, 6545, 7424, 16664, 19995, 21775, 24996, 26665, 43243, 49998, 86486, 148480, 166664, 175150, 199995, 217775, 249996, 266665, 368180, 484847, 499998, 654545, 742424, 1001001, 1081075, 1216216, 1249992, 1297290, 1451850, 1471468, 1481477 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

This sequence does not contain any repdigits, unlike A245385.

LINKS

Table of n, a(n) for n=1..39.

EXAMPLE

4*84847 = 48484*7 = 339388. Thus 484847 is a member of this sequence.

PROG

(Python)

for n in range(1, 10**7):

..s = str(n)

..count = 0

..for i in range(1, len(s)):

....if i != len(s) - i:

......if int(s[:i]) != int(s[len(s)-i:]):

........num = int(s[:i])*int(s[i:])

........if num != 0:

..........if num == int(s[:len(s)-i])*int(s[len(s)-i:]):

............count += 1

............break

..if count > 0:

....print(n, end=', ')

CROSSREFS

Cf. A245385, A245364.

Cf. A262743 (predestined numbers).

Sequence in context: A127882 A240255 A045006 * A063354 A240248 A105653

Adjacent sequences:  A245383 A245384 A245385 * A245387 A245388 A245389

KEYWORD

nonn,base

AUTHOR

Derek Orr, Jul 20 2014

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 October 18 07:58 EDT 2019. Contains 328146 sequences. (Running on oeis4.)