The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A211864 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A211864

Powers of three read in base 2.
(history; published version)

#8 by T. D. Noe at Mon Feb 11 14:43:53 EST 2013

STATUS

reviewed

approved

#7 by Joerg Arndt at Mon Feb 11 13:24:49 EST 2013

STATUS

proposed

reviewed

#6 by Robert G. Wilson v at Sun Feb 10 22:07:10 EST 2013

STATUS

editing

proposed

#5 by Robert G. Wilson v at Sun Feb 10 22:06:39 EST 2013

NAME

allocated for Robert GPowers of three read in base 2. Wilson v

DATA

1, 3, 9, 11, 17, 19, 41, 43, 81, 131, 169, 219, 241, 419, 681, 651, 849, 1203, 2441, 1867, 4369, 3027, 5625, 12475, 15457, 26403, 26553, 48795, 54561, 99667, 80345, 158731, 221313, 332467, 460857, 375451, 569345, 987267, 1181145, 1594971, 1924001, 4458531

OFFSET

0,2

EXAMPLE

a(3)=11 because 3^3=27_10 but in base 2 it is interpreted as 2*2^1+7*2^0=4+7=11. That is to say, digits larger than the base are carried.

MATHEMATICA

f[n_] := FromDigits[ IntegerDigits[3^n], 2]; Array[f, 42, 0]

CROSSREFS

Cf. A004656.

KEYWORD

allocated

nonn,base,easy

AUTHOR

Robert G. Wilson v, Feb 10 2013

STATUS

approved

editing

#4 by Robert G. Wilson v at Sun Feb 10 22:06:39 EST 2013

NAME

allocated for Robert G. Wilson v

KEYWORD

recycled

allocated

#3 by R. J. Mathar at Fri Jan 04 11:23:12 EST 2013

STATUS

editing

approved

#2 by R. J. Mathar at Fri Jan 04 11:23:09 EST 2013

NAME

allocated for Matthew C. Russell

KEYWORD

allocated

recycled

STATUS

approved

editing

#1 by Matthew C. Russell at Mon Apr 23 20:11:35 EDT 2012

NAME

allocated for Matthew C. Russell

KEYWORD

allocated

STATUS

approved