gaps in sigma()

[Jud McCranie]

At 07:25 PM 8/8/2005, Max wrote:

>It makes sense to add two more sequences:
>
>sequences a(n) after eliminating duplicate terms (i.e., increasing gaps 
>starting positions)
>b(n) = 2, 9, 49, 423, 1333, 4425, ...
>
>associated gap length
>c(n) = 1, 3, 5, 9, 11, ...

Ahhhhh, don't get me started!  :-)

2,9,49,423,1333,4425,8763,14089,22825,40291,178705,661285,4543141,20706715,29243521,31089603,32341621,99158905,417976441, 
(no others < 500,000,000)

1,3,5,9,11,15,17,19,23,29,31,35,47,53,55,57,59,67,