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0, 1, 2, 3, 6, 5, 6, 7, 14, 13, 14, 11, 14, 13, 14, 15, 30, 29, 30, 27, 30, 29, 30, 23, 30, 29, 30, 27, 30, 29, 30, 31, 62, 61, 62, 59, 62, 61, 62, 55, 62, 61, 62, 59, 62, 61, 62, 47, 62, 61, 62, 59, 62, 61, 62, 55, 62, 61, 62, 59, 62, 61, 62, 63, 126, 125, 126, 123, 126, 125
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,3
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COMMENTS
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a(2*n) = 2*(A062383(n)-1);
A023416(a(n)) <= 1.
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LINKS
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R. Zumkeller, Table of n, a(n) for n = 0..10000
R. Zumkeller, Logical Convolutions
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MAPLE
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A142151 := n -> n + Bits:-Nor(n, n+1):
seq(A142151(n), n=0..69); # Peter Luschny, Sep 26 2019
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PROG
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(Haskell)
import Data.Bits (xor, (.|.))
a142151 :: Integer -> Integer
a142151 = foldl (.|.) 0 . zipWith xor [0..] . reverse . enumFromTo 1
-- Reinhard Zumkeller, Mar 31 2015
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CROSSREFS
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Cf. A003817, A000004, A142149, A086099, A142150, A001477, A089633.
Sequence in context: A340774 A057723 A335835 * A003968 A076734 A242314
Adjacent sequences: A142148 A142149 A142150 * A142152 A142153 A142154
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KEYWORD
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nonn,hear,look
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AUTHOR
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Reinhard Zumkeller, Jul 15 2008
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STATUS
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approved
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