A338167 Decimal expansion of Sum_{n>=1} 1/(2n)^(2n-1).

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

Offset: 0

Author

Mario Cortés, Oct 14 2020

Keywords

• nonn
• cons

Comments

Is the sum of the inverse of even numbers raised to the odd numbers.

Examples

			0.51575407866155061123838088838465692424297596755674236022...
		

Crossrefs

Cf. A085535, A338168.

Programs

PARI

suminf(n=1, (2*n)^(-2*n+1))

Formula

Equals Sum_{n>=1} 1/A085535(n).

Extensions

More terms from Jon E. Schoenfield, Mar 21 2021