The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A062672 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A062672

Composite and every divisor (except 1) contains the digit 5.
(history; published version)

#15 by Harvey P. Dale at Sun Jan 22 15:45:29 EST 2023

STATUS

editing

approved

#14 by Harvey P. Dale at Sun Jan 22 15:45:26 EST 2023

MATHEMATICA

Select[Range[6300], CompositeQ[#]&&AllTrue[Rest[Divisors[#]], DigitCount[ #, 10, 5]> 0&]&] (* Harvey P. Dale, Jan 22 2023 *)

STATUS

approved

editing

#13 by Bruno Berselli at Thu Nov 07 05:17:58 EST 2019

STATUS

reviewed

approved

#12 by Joerg Arndt at Thu Nov 07 04:42:11 EST 2019

STATUS

proposed

reviewed

#11 by Michel Marcus at Thu Nov 07 04:16:43 EST 2019

STATUS

editing

proposed

#10 by Michel Marcus at Thu Nov 07 04:16:40 EST 2019

EXAMPLE

25 has divisors 1, 5 and 25, all of which contain the digit 5.

STATUS

proposed

editing

#9 by Amiram Eldar at Thu Nov 07 03:30:49 EST 2019

STATUS

editing

proposed

#8 by Amiram Eldar at Thu Nov 07 03:27:29 EST 2019

CROSSREFS

Cf. A062653, A062664, A062667, A062668, A062669, A062670, A062671, A062673, A062674, A062675, A062676, A062677, A062678, A062679, A062680.

#7 by Amiram Eldar at Thu Nov 07 03:12:40 EST 2019

OFFSET

0,1,1

LINKS

Amiram Eldar, <a href="/A062672/b062672.txt">Table of n, a(n) for n = 1..10000</a>

EXTENSIONS

Offset corrected by Amiram Eldar, Nov 07 2019

STATUS

approved

editing

#6 by N. J. A. Sloane at Wed Jun 11 21:23:08 EDT 2014

STATUS

proposed

approved