login

A188479 as a simple table

na(n)
01
11
22
34
412
540
6156
7700
83520
919592
10119992
11801272
125792464
1345071600
14375615696
153338063600
1631511918816
17314913425280
183321357021600
1936868596345056
20429672869359360
215245439731918784
2266941714022827072
23891387254398818752
2412363478873222765568
25178331546692362644992
262671094825005048612224

[1,1,2,4,12,40,156,700,3520,19592,119992,801272,
 5792464,45071600,375615696,3338063600,31511918816,
 314913425280,3321357021600,36868596345056,
 429672869359360,5245439731918784,
 66941714022827072,891387254398818752,
 12363478873222765568,178331546692362644992,
 2671094825005048612224]