A184617 With nonadjacent forms: A184615(n) + A184616(n).
0, 1, 2, 5, 4, 5, 10, 9, 8, 9, 10, 21, 20, 21, 18, 17, 16, 17, 18, 21, 20, 21, 42, 41, 40, 41, 42, 37, 36, 37, 34, 33, 32, 33, 34, 37, 36, 37, 42, 41, 40, 41, 42, 85, 84, 85, 82, 81, 80, 81, 82, 85, 84, 85, 74, 73, 72, 73, 74, 69, 68, 69, 66, 65, 64, 65, 66, 69, 68, 69, 74, 73, 72, 73, 74, 85, 84, 85, 82, 81, 80, 81, 82
Offset: 0
Examples
See A184615.
Links
- Alois P. Heinz, Table of n, a(n) for n = 0..10922
- Joerg Arndt, Matters Computational (The Fxtbook), pages 61-62.
Programs
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Mathematica
a[n_] := Module[{nh, n3, c}, nh = BitShiftRight[n]; n3 = n + nh; c = BitXor[nh, n3]; BitAnd[n3, c] + BitAnd[nh, c]]; Table[a[n], {n, 0, 100}] (* Jean-François Alcover, May 30 2019, from PARI code in A184615 *) -
PARI
(see A184615)
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Python
for n in range(77): print((n^(n*3))/2, end=',') # Alex Ratushnyak, Aug 13 2012
Formula
a(n) = A178729(n)/2 = (n XOR n*3)/2. Note a(2^n) = 2^n. - Alex Ratushnyak, Aug 13 2012
Comments