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A266891 as a simple table

na(n)
01
11
24
313
429
581
6188
7456
81030
92405
105295
1111611
1225246
1353552
14113332
15235685
16486011
17990840
182006567
194018010
207992003
2115768511
2230875424
2360060509
24116042548
25222817961
26425200270
27806991037
281522748592
292858792520
305339457208
319924370365

[1,1,4,13,29,81,188,456,1030,2405,5295,11611,
 25246,53552,113332,235685,486011,990840,2006567,
 4018010,7992003,15768511,30875424,60060509,
 116042548,222817961,425200270,806991037,
 1522748592,2858792520,5339457208,9924370365]