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A002137 as a simple table

na(n)
01
10
21
31
46
522
6130
7822
86202
952552
10499194
115238370
1260222844
13752587764
1410157945044
15147267180508
162282355168060
1737655004171808
18658906772228668
1912188911634495388
20237669544014377896
214871976826254018760
22104742902332392298296

[1,0,1,1,6,22,130,822,6202,52552,499194,5238370,
 60222844,752587764,10157945044,147267180508,
 2282355168060,37655004171808,658906772228668,
 12188911634495388,237669544014377896,
 4871976826254018760,104742902332392298296]