A332784 - cp's OEIS frontend

A332784 The number of permutations of {n 1's, n 2's,...,n n's} with the property that b(1) >= b(2) >= ... >= b(n), where n k's are skipped by b(k) for k=1..n.

n	a(n)
2	5
3	18
4	110
5	508
6	4968
7	25824
8	305376
9	2375616
10	28316832
11	202354752
12	4771240704
13	33499830528
14	612464852736
15	9023719675392
16	176001733301760
17	1649576855476224
18	56693983168309248
19	551579829498390528
20	20888523161929138176
21	342595860998544285696

[5, 18, 110, 508, 4968, 25824, 305376, 2375616, 28316832, 202354752, 4771240704, 33499830528, 612464852736, 9023719675392, 176001733301760, 1649576855476224, 56693983168309248, 551579829498390528, 20888523161929138176, 342595860998544285696]

cp's OEIS Frontend

A332784 The number of permutations of {n 1's, n 2's,...,n n's} with the property that b(1) >= b(2) >= ... >= b(n), where n k's are skipped by b(k) for k=1..n.

Table of values

List of values