Intended for: March 3, 2013
Timetable
- First draft entered by Alonso del Arte on February 13, 2012 ✓
- Draft reviewed by Daniel Forgues on March 3, 2016 ✓
- Draft to be approved by February 3, 2013
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A061278 a (n) = 5 a (n − 1) − 5 a (n − 2) + a (n − 3) |
, with
and
if
.
-
{ 1, 5, 20, 76, 285, 1065, 3976, 14840, ... }
Gil Broussard noticed that these are “numbers
such that
n (n + 1) = (n + i ) = n x + i |
for some
,” except of course for the first term.