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A119990 as a simple table

na(n)
11
21
32
44
58
616
732
88
972
10144
11288
1272
13648
141296
152592
16808
175992
186872
1918856
2037712
2175424
22150848
23301696
24598224
251201616
261201616
273600312
287199168
2914404328
3028808656
3157617312
3249885800
33164522200
34329642624
35659285248

[1,1,2,4,8,16,32,8,72,144,288,72,648,1296,2592,
 808,5992,6872,18856,37712,75424,150848,301696,
 598224,1201616,1201616,3600312,7199168,14404328,
 28808656,57617312,49885800,164522200,329642624,
 659285248]