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A056864 Nearest integer to n^2/10. 2
0, 0, 0, 1, 2, 3, 4, 5, 6, 8, 10, 12, 14, 17, 20, 23, 26, 29, 32, 36, 40, 44, 48, 53, 58, 63, 68, 73, 78, 84, 90, 96, 102, 109, 116, 123, 130, 137, 144, 152, 160, 168, 176, 185, 194, 203, 212, 221, 230, 240, 250, 260, 270, 281, 292, 303, 314, 325 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..57.

FORMULA

Conjecture: G.f.: -x^3*(1+x^2)*(x^4-x^2+1) / ( (1+x) *(x^4-x^3+x^2-x+1) *(x^4+x^3+x^2+x+1) *(x-1)^3 ). - R. J. Mathar, Mar 08 2016

MAPLE

A056864 := proc(n)

    floor(n^2/10+1/2) ;

end proc:

seq(A056864(n), n=0..100) ; # R. J. Mathar, Mar 08 2016

PROG

(PARI) a(n) = round(n^2/10); \\ Michel Marcus, Mar 08 2016

CROSSREFS

Cf. A056865.

Sequence in context: A287642 A237118 A112402 * A029032 A218906 A059809

Adjacent sequences:  A056861 A056862 A056863 * A056865 A056866 A056867

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Sep 02 2000

STATUS

approved

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Last modified March 23 14:17 EDT 2019. Contains 321431 sequences. (Running on oeis4.)