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A149340 as a simple table

na(n)
01
11
24
312
440
5154
6590
72291
89523
939351
10164720
11711336
123073150
1313376333
1459305585
15263251753
161174914851
175305026397
1823991323059
19108935348192
20498558014381
212285348450639
2210508708646670
2348595333492782
24225057299921016
251044912400895195
264871739738152142
2722745133446781661

[1,1,4,12,40,154,590,2291,9523,39351,164720,
 711336,3073150,13376333,59305585,263251753,
 1174914851,5305026397,23991323059,108935348192,
 498558014381,2285348450639,10508708646670,
 48595333492782,225057299921016,1044912400895195,
 4871739738152142,22745133446781661]