login

A270256 as a simple table

na(n)
10
20
30
40
512
60
70
824
966
100
110
1248
13768
14468
150
160
1772
184428
1937848
203612
210
220
23108
2414976
25772056
263280968
2740020
280
290
30144
3142750
327876728
33308256072
34534438768
35601368
360
370
38192
3996768
4051535116
4112712991544
42302595682944
43168922341960

[0,0,0,0,12,0,0,24,66,0,0,48,768,468,0,0,72,4428,
 37848,3612,0,0,108,14976,772056,3280968,40020,0,0,
 144,42750,7876728,308256072,534438768,601368,0,0,
 192,96768,51535116,12712991544,302595682944,
 168922341960]