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A135410 as a simple table

na(n)
01
11
22
34
410
526
680
7272
81076
94848
1024832
11142340
12902440
136257264
1447042924
15380800060
163300070116
1730472353884
18298595442140

[1,1,2,4,10,26,80,272,1076,4848,24832,142340,
 902440,6257264,47042924,380800060,3300070116,
 30472353884,298595442140]