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A320663 as a simple table

na(n)
01
11
24
37
421
540
6106
7216
8534
91139
102715
115962
1214012
1331420
1473484
15167617
16392714
17908600
182140429
195015655
2011905145
2128228533
2267590229
23162067916
24391695348
25949359190
262316618809
275673557284
2813979155798
2934583650498
3086034613145
31214948212879

[1,1,4,7,21,40,106,216,534,1139,2715,5962,14012,
 31420,73484,167617,392714,908600,2140429,5015655,
 11905145,28228533,67590229,162067916,391695348,
 949359190,2316618809,5673557284,13979155798,
 34583650498,86034613145,214948212879]