login

A000774 as a simple table

na(n)
01
12
25
317
474
5394
62484
718108
8149904
91389456
1014257440
11160460640
121965444480
1326029779840
14370643938560
155646837369600
1691657072281600
171579093018675200
1828779361764249600
19553210247226470400
2011185850044938240000
21237335752951879680000

[1,2,5,17,74,394,2484,18108,149904,1389456,
 14257440,160460640,1965444480,26029779840,
 370643938560,5646837369600,91657072281600,
 1579093018675200,28779361764249600,
 553210247226470400,11185850044938240000,
 237335752951879680000]