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A297201 as a simple table

na(n)
01
12
24
310
434
5148
6786
74920
835446
9288822
102625844
1126349340
12289248224
133447860798
1444348374106
15612228009210
169028698146956
17141655958846642
182355980548168314
1941403643674710280
20766627753698325214

[1,2,4,10,34,148,786,4920,35446,288822,2625844,
 26349340,289248224,3447860798,44348374106,
 612228009210,9028698146956,141655958846642,
 2355980548168314,41403643674710280,
 766627753698325214]