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A149338 as a simple table

na(n)
01
11
24
312
440
5149
6560
72135
88355
933259
10133255
11538825
122200026
139034022
1437274431
15154600734
16644062873
172692163743
1811289636850
1947490421438
20200293595870
21846706012593
223587270304952
2315229272818359
2464770883633813
25275939465431865
261177442622478762
275031536426507492

[1,1,4,12,40,149,560,2135,8355,33259,133255,
 538825,2200026,9034022,37274431,154600734,
 644062873,2692163743,11289636850,47490421438,
 200293595870,846706012593,3587270304952,
 15229272818359,64770883633813,275939465431865,
 1177442622478762,5031536426507492]