

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
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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), 11121113.
Index entries for sequences related to binary matrices


FORMULA

n^(1/2)  n^(5/16) < a(n) <= floor((1/2) * (3 + sqrt(4*n3))) [from Wang and Guy].  Sean A. Irvine, Jun 06 2015


CROSSREFS

Cf. A003509, A005991.
Sequence in context: A288914 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



