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A083094 Numbers k such that Sum_{j=0..k} (binomial(k,j) mod 3) is odd. 3
0, 8, 20, 24, 56, 60, 72, 80, 164, 168, 180, 188, 216, 224, 236, 240, 488, 492, 504, 512, 540, 548, 560, 564, 648, 656, 668, 672, 704, 708, 720, 728, 1460, 1464, 1476, 1484, 1512, 1520, 1532, 1536, 1620, 1628, 1640, 1644, 1676, 1680, 1692, 1700, 1944, 1952 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Apparently a(n)/2 (mod 3) = A010060(n), the Thue-Morse sequence.
LINKS
PROG
(PARI) isok(n) = sum(k=0, n, binomial(n, k) % 3) % 2; \\ Michel Marcus, Dec 05 2013
CROSSREFS
Sequence in context: A205318 A100212 A349168 * A164916 A207190 A110116
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, Apr 22 2003
EXTENSIONS
More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 29 2003
STATUS
approved

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Last modified March 29 04:59 EDT 2024. Contains 371264 sequences. (Running on oeis4.)