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A354418 as a simple table

na(n)
11
22
36
430
55
635
770
8770
910010
105005
1115015
12255255
134849845
141616615
153233230
1674364290
1737182145
181078282205
196469693230
20200560490130
216077590610
223038795305
23607759061
2422487085257
2544974170514
26134922511542
275531822973222
28921970495537
2939644731308091

[1,2,6,30,5,35,70,770,10010,5005,15015,255255,
 4849845,1616615,3233230,74364290,37182145,
 1078282205,6469693230,200560490130,6077590610,
 3038795305,607759061,22487085257,44974170514,
 134922511542,5531822973222,921970495537,
 39644731308091]