The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A031458

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

A031458

Numbers whose base-3 representation has 2 fewer 0's than 2's.
(history; published version)

#14 by Alois P. Heinz at Sun Jul 04 18:29:20 EDT 2021

STATUS

proposed

approved

#13 by Jon E. Schoenfield at Sun Jul 04 13:47:03 EDT 2021

STATUS

editing

proposed

#12 by Jon E. Schoenfield at Sun Jul 04 13:46:59 EDT 2021

NAME

Numbers which in whose base -3 have representation has 2 fewer 0's than 2's.

CROSSREFS

Cf. A007089.

KEYWORD

nonn,base

STATUS

approved

editing

#11 by Joerg Arndt at Sat Aug 24 05:55:24 EDT 2013

STATUS

proposed

approved

#10 by Vincenzo Librandi at Sat Aug 24 04:08:21 EDT 2013

STATUS

editing

proposed

#9 by Vincenzo Librandi at Sat Aug 24 04:08:12 EDT 2013

LINKS

Vincenzo Librandi, <a href="/A031458/b031458.txt">Table of n, a(n) for n = 1..1000</a>

STATUS

approved

editing

#8 by T. D. Noe at Fri Aug 23 16:14:19 EDT 2013

STATUS

editing

approved

#7 by T. D. Noe at Fri Aug 23 16:14:15 EDT 2013

NAME

n-th number k Numbers which in base 3 has have 2 fewer 0's than 2's.

MATHEMATICA

Select[Range[400], DigitCount[#, 3, 0] == DigitCount[#, 3, 2] - 2&] (* Harvey P. Dale, Aug 23 2013 *)

STATUS

approved

editing

#6 by Harvey P. Dale at Fri Aug 23 15:21:13 EDT 2013

STATUS

editing

approved

#5 by Harvey P. Dale at Fri Aug 23 15:21:06 EDT 2013

MATHEMATICA

Select[Range[400], DigitCount[#, 3, 0]==DigitCount[#, 3, 2]-2&] (* Harvey P. Dale, Aug 23 2013 *)

STATUS

approved

editing