|
|
|
|
|
|
|
|
|
#37 by Joerg Arndt at Tue Dec 12 08:23:25 EST 2023
|
|
|
|
|
|
|
|
#36 by Paolo P. Lava at Tue Dec 12 08:18:07 EST 2023
|
|
|
|
|
|
|
|
#35 by Paolo P. Lava at Tue Dec 12 08:18:04 EST 2023
|
|
| FORMULA
|
a(n) = (1/6)*{28*(n mod 4) - 17*[(n+1) mod 4] + 10*[(n+2) mod 4] + [(n+3) mod 4]}, with n>=0. - Paolo P. Lava, Nov 06 2008
a(n) = (11/2) + 3*I^(n+1) - (9/2)*(-1)^n - 3*I^(1-n), with n>=0 and I=sqrt(-1). - Paolo P. Lava, May 04 2010
|
|
| STATUS
|
approved
editing
|
|
|
|
|
|
|
#34 by Joerg Arndt at Sun Jan 01 02:28:47 EST 2023
|
|
|
|
|
|
|
|
#33 by Michel Marcus at Sun Jan 01 02:18:52 EST 2023
|
|
|
|
|
|
|
|
#32 by Amiram Eldar at Sun Jan 01 01:03:50 EST 2023
|
|
|
|
|
|
|
|
#31 by Amiram Eldar at Sun Jan 01 00:52:59 EST 2023
|
|
| FORMULA
|
GCD[(4k - k^2, 5k^2, 20k - 20k^2, 16 - 32k + 16k^2] ) for k = 1,2,3,...
|
|
|
|
|
|
|
#30 by Amiram Eldar at Sun Jan 01 00:52:21 EST 2023
|
|
| FORMULA
|
From Amiram Eldar, Jan 01 2023: (Start)
Multiplicative with a(2) = 4, a(2^e) = 16 for e >= 2, and a(p^e) = 1 for p >= 3.
Dirichlet g.f.: zeta(s)*(12/4^s+3/2^s+1). (End)
|
|
| STATUS
|
approved
editing
|
|
|
|
|
|
|
#29 by Charles R Greathouse IV at Thu Sep 08 08:45:38 EDT 2022
|
|
|
|
|
|
Discussion
|
| Thu Sep 08
| 08:45
| OEIS Server: https://oeis.org/edit/global/2944
|
|
|
|
|
|
|
#28 by R. J. Mathar at Tue Feb 12 04:26:29 EST 2019
|
|
|
|
|
|
|
