OFFSET
1,1
LINKS
FORMULA
Numbers of the form 4k+3 together with the terms of A103584.
It is shown in the reference that A102370(k) = k iff n == 0 (mod 4) and n does not belong to any of the arithmetic progressions Q_r := {2^(4r)*j - 4r, j >= 1} for r = 1, 2, 3, ...
In other words, the sequence consists of the numbers of the form j*2^(4k-2) - k for k >=2 and j >= 1.
MATHEMATICA
f[n_] := Block[{k = 1, s = 0, l = Max[2, Floor[Log[2, n + 1] + 2]]}, While[k < l, If[ Mod[n + k, 2^k] == 0, s = s + 2^k]; k++ ]; s]; Complement[ Range[225], Select[ Range[900], f[ # ] == 0 &]/4] (* Robert G. Wilson v, Mar 23 2005 *)
CROSSREFS
KEYWORD
nonn,easy,base
AUTHOR
N. J. A. Sloane, Mar 23 2005
EXTENSIONS
More terms from Robert G. Wilson v, Mar 23 2005
STATUS
approved