The On-Line Encyclopedia of Integer Sequences (OEIS)

A081820 revision #19

A081820

Decimal expansion of the Stefan-Boltzmann constant sigma in the 2019 SI system in units Watt/(m^2*K^4).

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

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OFFSET

-7,1

COMMENTS

From Jeremy Tan, Jun 13 2019: (Start)

The Stefan-Boltzmann law states that for a black body with temperature T, its radiant emittance j* (power radiated per unit area) is sigma * T^4.

In SI units, all the values in the defining relation in the Formula section are fixed as of May 20 2019 (see the BIPM link), so this constant is also fixed. (End)

LINKS

Table of n, a(n) for n=-7..94.

BIPM, On the revision of the International System of Units (SI), BIPM, Nov 13-16 2018.

NIST, CODATA Value: Stefan-Boltzmann constant

Wikipedia, Stefan-Boltzmann constant

Wikipedia, Stefan-Boltzmann law

Index entries for natural constants

Index entries for transcendental numbers

FORMULA

sigma = 5.6703744... * 10^-8 W m^-2 K^-4

Equals A222609*A070063^4/(A003676^3*A003678^2).

MATHEMATICA