The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A375623 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A375623

Maximum value of F(p) = Sum (|i-j| - |p(i)-p(j)|)^2 where the sum is over all 1 <= i < j <= n, for all permutations p in the symmetric group S_n.
(history; published version)

#26 by Alois P. Heinz at Wed Sep 04 15:57:09 EDT 2024

STATUS

proposed

approved

#25 by Hugo Pfoertner at Wed Sep 04 15:52:46 EDT 2024

STATUS

editing

proposed

#24 by Hugo Pfoertner at Wed Sep 04 15:50:00 EDT 2024

DATA

0, 0, 0, 2, 12, 30, 72, 132, 240, 380, 600, 870, 1260, 1722, 2532, 3080

EXTENSIONS

a(14) from Markus Sigg, Aug 25 2024

a(15) from Hugo Pfoertner, Sep 04 2024

STATUS

approved

editing

#23 by Alois P. Heinz at Sat Aug 24 14:46:03 EDT 2024

STATUS

proposed

approved

#22 by Peter Luschny at Sat Aug 24 05:58:26 EDT 2024

STATUS

editing

proposed

#21 by Peter Luschny at Sat Aug 24 05:55:52 EDT 2024

DATA

0, 0, 0, 2, 12, 30, 72, 132, 240, 380, 600, 870, 1260, 1722

OFFSET

2,2

0,4

STATUS

proposed

editing

#20 by Hugo Pfoertner at Fri Aug 23 15:12:56 EDT 2024

STATUS

editing

proposed

Discussion

Sat Aug 24

05:55

Peter Luschny: A375625 has offset 0, and both sequences should be equal in this; this also follows the suggestion of Hugo.

#19 by Hugo Pfoertner at Fri Aug 23 15:10:13 EDT 2024

DATA

0, 2, 12, 30, 72, 132, 240, 380, 600, 870, 1260, 1722

EXTENSIONS

a(11)-a(1213) from Hugo Pfoertner, Aug 22 23 2024

STATUS

proposed

editing

#18 by Alois P. Heinz at Thu Aug 22 16:00:06 EDT 2024

STATUS

editing

proposed

#17 by Alois P. Heinz at Thu Aug 22 15:59:57 EDT 2024

CROSSREFS

Cf. A047928, A126972, A375625.

STATUS

proposed

editing