[seqfan] sigma(n) =

[юрий герасимов]

Dear SeqFans, n such that:

1) sigma(n) = sigma(n - 2) + sigma(n + 2):    5160, 19080, 210336, 606420, 1146720, 2382480, 3409140, ...

2) sigma(n) = sigma(n - 2) - sigma(n + 2):     12812942, 45553367, 95028362, ...

3) sigma(n) = sigma(n + 2) - sigma(n - 2):    358, 62494, 342238, 410638, 8219473, 58463494, ...

The sequences are "of general interest"?

Best regards, JSG