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A276728 as a simple table

na(n)
01
11
24
329
4336
55375
6111138
72845864
887597223
93170429794
10132647186513
116328769607152
12340517379645028
1320469645334387763
141363935094328964210
15100052662656438620359
168032243625863280744704

[1,1,4,29,336,5375,111138,2845864,87597223,
 3170429794,132647186513,6328769607152,
 340517379645028,20469645334387763,
 1363935094328964210,100052662656438620359,
 8032243625863280744704]