1,1

Bela Bajnok, Additive Combinatorics: A Menu of Research Problems, Manuscript, May 2017. See Corollary C.56.

Table of n, a(n) for n=1..82.

Bela Bajnok, Additive Combinatorics: A Menu of Research Problems, arXiv:1705.07444 [math.NT], May 2017. See Corollary C.56.

a(n) = floor( (sqrt(4*n + 9) + 3) / 2).

Table[Floor[(Sqrt[4*n + 9] + 3)/2], {n, 100}]

Cf. A155934, A288583, A289434.

Sequence in context: A128112 A122669 A071942 * A134849 A096056 A050501

Adjacent sequences: A289186 A289187 A289188 * A289190 A289191 A289192

nonn

Robert Price, Aug 13 2017

approved