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 A227453 Numbers k such that the distance to the largest square less than k is a multiple of 4. 2
 8, 13, 20, 24, 29, 33, 40, 44, 48, 53, 57, 61, 68, 72, 76, 80, 85, 89, 93, 97, 104, 108, 112, 116, 120, 125, 129, 133, 137, 141, 148, 152, 156, 160, 164, 168, 173, 177, 181, 185, 189, 193, 200, 204, 208, 212, 216, 220, 224, 229, 233, 237, 241, 245, 249, 253, 260, 264, 268, 272, 276, 280 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A071797(a(n)) = 4*m, A053186(a(n)+1) = 4*m, m > 0. Apparently a bisection of A079896. While it may not be difficult to prove that the sequence is a subsequence of A079896, the apparent fact that a(n) = A079896(2n-1) is by no means obvious. LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 EXAMPLE 8 - 2^2 = 1*4 and 24 - 4^2 = 2*4 so 8 and 24 are in the sequence. MATHEMATICA lsm4Q[n_]:=Module[{s=Floor[Sqrt[n]]^2}, s

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Last modified June 20 05:29 EDT 2024. Contains 373512 sequences. (Running on oeis4.)