Ed Pegg Jr wrote:
> http://www.research.att.com/projects/OEIS?Anum=A023199
> {3!, 5!, 11#3!2, 17#5!2, 29#7!4, 53#7!12, 89#11!2,
> 157#17#8!6, ???, 487#*29#*10!/2}
The missing term is 271#23#10! .
That last term (487#29#10!/2) is wrong; it has sigma/n = 10.995-.
It should be just 487#29#10! .
The next term is 857#37#11!42 .
--
Don Reble djr at nk.ca