A332783 - cp's OEIS frontend

A332783 The number of permutations of {(n+1) 1's, (n+1) 2's, ..., (n+1) n's} with the property that k's are equally spaced for k=1..n and the interval of k+1 is less than or equal to the interval of k for k=1..n-1.

n	a(n)
1	1
2	4
3	16
4	104
5	484
6	4848
7	25104
8	300336
9	2335296
10	27953952
11	198725952
12	4731323904
13	33020828928
14	606237831936
15	8936541384192
16	174694058933760
17	1628654065588224
18	56338295740213248
19	545177455792662528
20	20766878061520306176
21	340162958990367645696

[1, 4, 16, 104, 484, 4848, 25104, 300336, 2335296, 27953952, 198725952, 4731323904, 33020828928, 606237831936, 8936541384192, 174694058933760, 1628654065588224, 56338295740213248, 545177455792662528, 20766878061520306176, 340162958990367645696]

cp's OEIS Frontend

A332783 The number of permutations of {(n+1) 1's, (n+1) 2's, ..., (n+1) n's} with the property that k's are equally spaced for k=1..n and the interval of k+1 is less than or equal to the interval of k for k=1..n-1.

Table of values

List of values