A086142 - OEIS

A086142

a(n) = floor( log( prime(n) )^2 ).

0, 1, 2, 3, 5, 6, 8, 8, 9, 11, 11, 13, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 19, 20, 20, 21, 21, 21, 22, 22, 23, 23, 24, 24, 25, 25, 25, 25, 26, 26, 26, 27, 27, 27, 27, 28, 28, 29, 29, 29, 29, 29, 30, 30, 30, 31, 31, 31, 31, 31, 31, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34, 34

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OFFSET

1,3

LINKS

Table of n, a(n) for n=1..72.

EXAMPLE

a(5)=5: floor(square(log 11)) because log(11) = 2.3979 and square(2.3979) = 5.74992.

MATHEMATICA

Table[ Floor[ Log[ Prime[n]]^2], {n, 1, 60}]

PROG

(PARI) vector(80, n, floor(log(prime(n))^2)) \\ Michel Marcus, Jun 29 2015

CROSSREFS

Sequence in context: A377738 A036587 A075145 * A258334 A039249 A039191

Adjacent sequences: A086139 A086140 A086141 * A086143 A086144 A086145

KEYWORD

easy,nonn

AUTHOR

Yang Sok Kim (yangsokk(AT)utas.edu.au), Aug 24 2003

EXTENSIONS

More terms from Robert G. Wilson v, Sep 01 2003

STATUS

approved