A074783 - OEIS

A074783

a(n) = floor(1/sin(x(n))) where x(n) is Pi truncated at the n-th decimal digit.

7, 24, 627, 1687, 10792, 376847, 1530011, 18660269, 278567575, 1695509434, 11136696004, 102111268281, 1260654956981, 10725187563685, 308788493220129, 4193528956200935, 25999253094360135, 118166387818704584

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OFFSET

0,1

COMMENTS

a(n+1) = a(n) for n = 31, 49, 53, 64, 70, 76, 84, 96, 105, 115, 120, 127, ...

LINKS

Table of n, a(n) for n=0..17.

FORMULA

Is there a formula for lim m_{n -> oo} log(a(n))/n >= 2?

EXAMPLE

x(4)=3.1415 and 1/sin(x(4))=10792.889... hence a(4)=10792.

PROG

(PARI) a(n)=floor(1/sin(floor(Pi*10^n)/10^n))

CROSSREFS

Sequence in context: A197791 A009652 A012777 * A286742 A322563 A065658

Adjacent sequences: A074780 A074781 A074782 * A074784 A074785 A074786

KEYWORD

nonn,base

AUTHOR

Benoit Cloitre, Sep 07 2002

STATUS

approved