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A190486
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Positions of 2 in A190483.
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24
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2, 7, 12, 14, 19, 24, 31, 36, 41, 43, 48, 53, 60, 65, 70, 72, 77, 82, 84, 89, 94, 101, 106, 111, 113, 118, 123, 130, 135, 140, 142, 147, 152, 159, 164, 171, 176, 181, 183, 188, 193, 200, 205, 210, 212, 217, 222, 229, 234, 239, 241, 246, 251, 253, 258, 263, 270, 275, 280, 282, 287, 292, 299, 304, 309, 311, 316
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OFFSET
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1,1
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COMMENTS
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LINKS
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MATHEMATICA
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r = Sqrt[2]; b = 2; c = 1;
f[n_] := Floor[(b*n + c)*r] - b*Floor[n*r] - Floor[c*r];
t = Table[f[n], {n, 1, 200}] (* A190483 *)
Flatten[Position[t, 0]] (* A190484 *)
Flatten[Position[t, 1]] (* A190485 *)
Flatten[Position[t, 2]] (* A190486 *)
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PROG
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(Python)
from sympy import sqrt, floor
r=sqrt(2)
def a190483(n): return floor((2*n + 1)*r) - 2*floor(n*r) - floor(r)
print([n for n in range(1, 501) if a190483(n)==2]) # Indranil Ghosh, Jul 02 2017
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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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