登录

A227415号作为一个简单的表

n个a(n)
00
10
21
2
47
5
69
769
8177
960
102715
114500
1242975
13104580
1491665
15186795
163493665
1713497435
1897345395
19442245825
202601636975
2113003053525
2270985324025
2364585694250
2457891366225
253576632909850
269411029102475
27147580842959550
28476966861546175
295708173568847750

[0,0,1,2,7,3,9,69,177,60,2715,4500,42975,104580,91665,186795,3493665,13497435,97345395,442245825,2601636975,13003053525,70985324025,64585694250,57891366225,3576632909850,9411029102475,147580842959550,476966861546175,5708173568847750]