A144188 - cp's OEIS frontend

A144188 a(n)/n! is the probability of guessing "up/down" correctly through a deck of n cards marked 1, 2, ..., n, if one always makes the most probable guess.

n	a(n)
0	1
1	1
2	2
3	5
4	16
5	62
6	286
7	1519
8	9184
9	62000
10	463964
11	3800684
12	33911424
13	326678010
14	3385261194
15	37492199549
16	442541571936
17	5539379635136
18	73368335117584
19	1024178393797764
20	15041551052243448
21	231665680071392900
22	3736363255881557460
23	62935656581952683960

[1, 1, 2, 5, 16, 62, 286, 1519, 9184, 62000, 463964, 3800684, 33911424, 326678010, 3385261194, 37492199549, 442541571936, 5539379635136, 73368335117584, 1024178393797764, 15041551052243448, 231665680071392900, 3736363255881557460, 62935656581952683960]

cp's OEIS Frontend

A144188 a(n)/n! is the probability of guessing "up/down" correctly through a deck of n cards marked 1, 2, ..., n, if one always makes the most probable guess.

Table of values

List of values