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A155934 The sequence k(m) defined in A005991. 2
2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..43.

E. T. Wang and R. K. Guy, Problem E2429, Amer. Math. Monthly, 81 (1974), 1112-1113.

Index entries for sequences related to binary matrices

FORMULA

n^(1/2) - n^(5/16) < a(n) <= floor((1/2) * (3 + sqrt(4*n-3))) [from Wang and Guy]. - Sean A. Irvine, Jun 06 2015

CROSSREFS

Cf. A003509, A005991.

Sequence in context: A087162 A046925 A090529 * A251719 A130822 A194220

Adjacent sequences:  A155931 A155932 A155933 * A155935 A155936 A155937

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Aug 15 2010

STATUS

approved

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Last modified March 30 20:18 EDT 2017. Contains 284302 sequences.