Numbers n for which abs((-1)^k*Sum_{k=1..n} ((n-k+1) mod k)) = 0.
A154586
Numbers n for which abs((-1)^k*Sum_{k=1..n} ((n-k+1) mod k)) = 0.
Terms
- a(0) =1a(1) =4a(2) =8a(3) =25a(4) =27a(5) =75a(6) =209a(7) =3507a(8) =8466a(9) =16179a(10) =29285a(11) =33987a(12) =175904a(13) =326764a(14) =1161207
External references
- oeis: A154586