cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A382309 Number of permutations of [2n] with exactly n ascents and an even number of inversions.

Table of values

n a(n)
0 1
1 1
2 5
3 147
4 7819
5 655315
6 81255642
7 13985577438
8 3191399514435
9 932692830330915
10 339781108888268398
11 150979116192562395562
12 80377829037419610855326
13 50509994170589416909171726
14 36995186973806250851237265812
15 31240798437883511927927569474140

List of values

[1, 1, 5, 147, 7819, 655315, 81255642, 13985577438, 3191399514435, 932692830330915, 339781108888268398, 150979116192562395562, 80377829037419610855326, 50509994170589416909171726, 36995186973806250851237265812, 31240798437883511927927569474140]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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