A248645 Number of light-years in a parsec, prior to its redefinition in August 2015.

3, 2, 6, 1, 5, 6, 3, 7, 7, 7, 1, 4, 1, 8, 7, 9, 8, 2, 9, 0, 5, 5, 5, 0, 9, 7, 7, 2, 9, 9, 6, 7, 5, 1, 7, 9, 2, 3, 2, 7, 8, 2, 8, 7, 2, 3, 6, 0, 8, 2, 3, 8, 2, 8, 2, 5, 3, 2, 5, 2, 9, 2, 6, 4, 1, 3, 4, 4, 2, 5, 7, 7, 3, 6, 6, 8, 7, 3, 1, 0, 8, 5, 4, 2, 3, 7, 6, 0, 0, 0, 7, 5, 1, 1, 5, 3, 1, 4, 5

Offset

1,1

Comments

Light takes approximately 3.26 years to cross a parsec.

Like A248424, this is an algebraic integer of degree 86400. - M. F. Hasler, Oct 31 2014

Although the definition has changed, this sequence is preserved in the OEIS for historical reasons. - N. J. A. Sloane, Oct 14 2017

Links

Table of n, a(n) for n=1..99.

Wikipedia, Parsec.

Wikipedia, Light-year

Index entries for algebraic numbers, degree 86400

Formula

Equals A248424 / A213614.

Example

3.261563777... light-years.

Prog

(PARI) A248645=(A248424=149597870700/tan(Pi/180/3600))/A213614=9460730472580800 \\ Then use eval(select(x->x>".", Vec(Str(%)))) to get the sequence of digits. First, use \pX to get X digits. M. F. Hasler, Oct 31 2014

Crossrefs

Cf. A163103, A213614, A217572, A248424, A292525, A344323.

Sequence in context: A244823 A286157 A016460 * A344323 A368826 A352150

Adjacent sequences: A248642 A248643 A248644 * A248646 A248647 A248648

Keyword

nonn,cons,easy

Author

Arkadiusz Wesolowski, Oct 10 2014

Extensions

Edited and more terms added by M. F. Hasler, Oct 31 2014

Name edited by Arkadiusz Wesolowski, Oct 14 2017

Status

approved