- #1
6c 6f 76 65
- 23
- 0
Good evening dearest physicians and mathematicians,
I recently came across the so-called "Svein-Graham sum", and i wondered: is it possible to find a simple formula for evaluating it?
[itex]\sum_{i=0}^k x\uparrow\uparrow i = \left .1+x+x^x+x^{x^x}+ ... +x^{x^{x^{x^{.^{.^{.^x}}}}}}\right \}k[/itex]
I recently came across the so-called "Svein-Graham sum", and i wondered: is it possible to find a simple formula for evaluating it?
[itex]\sum_{i=0}^k x\uparrow\uparrow i = \left .1+x+x^x+x^{x^x}+ ... +x^{x^{x^{x^{.^{.^{.^x}}}}}}\right \}k[/itex]