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Revision History for A169911 (Underlined text is an addition; strikethrough text is a deletion.)

Showing entries 1-10 | older changes
A169911 Primes in carryless digital root arithmetic in base 10.
(history; published version)
#13 by Joerg Arndt at Fri Jul 12 08:46:41 EDT 2013
STATUS

reviewed

approved

#12 by R. J. Mathar at Fri Jul 12 06:52:20 EDT 2013
STATUS

proposed

reviewed

#11 by R. J. Mathar at Fri Jul 12 06:43:04 EDT 2013
STATUS

editing

proposed

#10 by R. J. Mathar at Fri Jul 12 05:56:35 EDT 2013
EXAMPLE

96 has a representation 31*6 and is not in the sequence.

MAPLE

# carryLmult implemented in A169908

isA169911 := proc(n)

local a, b, un ;

un := {1, 2, 4, 5, 7, 8} ;

for a from 1 to n do

for b from 1 to a do

if a in un or b in un then

;

else

if carryLmult(a, b) = n then

return false;

end if;

end if;

end do:

end do:

if n in un then

false ;

else

true;

end if;

end proc:

e := 1:

for n from 1 do

if isA169911(n) then

printf("%d %d\n", e, n) ;

e := e+1 ;

end if;

end do: # R. J. Mathar, Jul 12 2013

STATUS

approved

editing

#9 by Russ Cox at Fri Mar 30 17:38:11 EDT 2012
AUTHOR

_David Applegate_, _, _Marc LeBrun (mlb(AT)well.com) _ and N. J. A. Sloane, Jul 11 2010

Discussion
Fri Mar 30 17:38
OEIS Server: https://oeis.org/edit/global/183
#8 by Russ Cox at Fri Mar 30 17:21:02 EDT 2012
AUTHOR

_David Applegate (david(AT)research.att.com), _, Marc LeBrun (mlb(AT)well.com) and N. J. A. Sloane, Jul 11 2010

Discussion
Fri Mar 30 17:21
OEIS Server: https://oeis.org/edit/global/118
#7 by Russ Cox at Fri Mar 30 16:51:45 EDT 2012
AUTHOR

David Applegate (david(AT)research.att.com), Marc LeBrun (mlb(AT)well.com) and _N. J. A. Sloane (njas(AT)research.att.com), _, Jul 11 2010

Discussion
Fri Mar 30 16:51
OEIS Server: https://oeis.org/edit/global/110
#6 by Russ Cox at Sun Jul 10 18:19:44 EDT 2011
LINKS

<a href="/Sindx_index/Ca.html#CARRYLESS">Index entries for sequences related to carryless arithmetic</a>

Discussion
Sun Jul 10 18:19
OEIS Server: https://oeis.org/edit/global/26
#5 by Tony Noe at Fri Nov 12 18:23:25 EST 2010
STATUS

reviewed

approved

#4 by Tony Noe at Fri Nov 12 17:25:46 EST 2010
STATUS

proposed

reviewed

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Last modified August 29 21:13 EDT 2024. Contains 375518 sequences. (Running on oeis4.)