The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A274879 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A274879

A statistic on orbital systems over n sectors: the number of orbitals with k returns.
(history; published version)

#28 by Alois P. Heinz at Mon Mar 23 13:28:13 EDT 2020

STATUS

proposed

approved

#27 by F. Chapoton at Mon Mar 23 12:58:26 EDT 2020

STATUS

editing

proposed

#26 by F. Chapoton at Mon Mar 23 12:58:17 EDT 2020

PROG

(Sage) # uses[unit_orbitals from A274709]

# Brute force counting, function unit_orbitals defined in A274709.

from itertools import accumulate

# Brute force counting

STATUS

approved

editing

Discussion

Mon Mar 23

12:58

F. Chapoton: use formal syntax for sage links

#25 by Peter Luschny at Thu Feb 27 16:53:34 EST 2020

STATUS

proposed

approved

#24 by F. Chapoton at Thu Feb 27 15:15:20 EST 2020

STATUS

editing

proposed

#23 by F. Chapoton at Thu Feb 27 15:15:16 EST 2020

PROG

Z = len(list(filter(lambda z: z == 0, L)))

for n in (0..10): print (orbital_returns(n))

STATUS

approved

editing

Discussion

Thu Feb 27

15:15

F. Chapoton: adapt sage code for python3

#22 by Joerg Arndt at Mon Jul 18 05:32:07 EDT 2016

STATUS

reviewed

approved

#21 by G. C. Greubel at Sun Jul 17 20:11:22 EDT 2016

STATUS

proposed

reviewed

#20 by Peter Luschny at Sun Jul 17 07:54:30 EDT 2016

STATUS

editing

proposed

#19 by Peter Luschny at Sun Jul 17 07:35:43 EDT 2016

LINKS

Peter Luschny, <a href="https://oeis.org/wiki/User:Peter_Luschny/Orbitals">Orbitals</a>