A291323 The arithmetic function v+-(n,4).

1, 1, 2, 1, 3, 1, 4, 3, 5, 3, 6, 3, 7, 5, 8, 3, 9, 5, 10, 7, 11, 5, 12, 5, 13, 9, 14, 7, 15, 7, 16, 11, 17, 9, 18, 9, 19, 13, 20, 9, 21, 11, 22, 15, 23, 11, 24, 11, 25, 17, 26, 13, 27, 15, 28, 19, 29, 15, 30, 15, 31, 21, 32, 15, 33, 17, 34, 23, 35

Offset

2,3

Links

Table of n, a(n) for n=2..70.

Bela Bajnok, Additive Combinatorics: A Menu of Research Problems, arXiv:1705.07444 [math.NT], May 2017. See Section 1.6.2.

Mathematica

vpm[n_, h_] := (d = Divisors[n]; Max[(2*Floor[(d - 2)/(2*h)] + 1)*n/d]); Table[vpm[n, 4], {n, 2, 70}]

Crossrefs

Cf. A289435, A289436, A289437, A289438, A289439, A289440, A289441, A290988.

Sequence in context: A036445 A289187 A098910 * A290988 A165025 A225045

Adjacent sequences: A291320 A291321 A291322 * A291324 A291325 A291326

Keyword

nonn

Author

Robert Price, Aug 22 2017

Status

approved