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A083866
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Positions of zeros in Per Nørgård's infinity sequence (A004718).
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6
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0, 5, 10, 17, 20, 27, 34, 40, 45, 54, 65, 68, 75, 80, 85, 90, 99, 105, 108, 119, 130, 136, 141, 150, 160, 165, 170, 177, 180, 187, 198, 210, 216, 221, 238, 257, 260, 267, 272, 277, 282, 291, 297, 300, 311, 320, 325, 330, 337, 340, 347, 354, 360
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OFFSET
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0,2
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COMMENTS
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First differences seem to be always >2.
Many (but not all) prime members are in A005107.
The composer Per Nørgård's name is also written in the OEIS as Per Noergaard.
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LINKS
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PROG
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(Haskell)
a083866 n = a083866_list !! n
a083866_list = filter ((== 0) . a004718) [0..]
(Python)
from itertools import groupby, islice
def A083866_gen(startvalue=0): # generator of terms >= startvalue
n, c = max(0, startvalue), 0
for k, g in groupby(bin(n)[2:]):
c = c+len(list(g)) if k == '1' else (-c if len(list(g))&1 else c)
while True:
if c == 0: yield n
n += 1
c = c-t-1 if (t:=(~n & n-1).bit_length())&1 else t+1-c
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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