Evaluating the sum and integral of s^-s

[Loren Booda]

$$\sum _{s =1}^{\infty}s^{-s}= ?$$

$$\int _{1}^{\infty}s^{-s}ds= ?$$

Does either this summation or integral define a fundamental constant?

 

[CRGreathouse]

The sum is 1.291285997062663540407282590595600541498619368274..., Sloane's http://www.research.att.com/~njas/sequences/A073009 .

The integral is 1.99545595750013800041872469845272435208621663... Both sum and integral are easy to calculate to a large number of decimal places.

The integral over 0 to 1 has the same value as the sum. I wasn't able to find anything interesting about the integral from 1 to infinity.

 

[Loren Booda]

Thank you for your research, CR. I guess they have no direct derivation from the constant e.