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A143954 as a simple table

na(n)
00
10
21
35
419
568
6243
7880
83233
912021
1045119
11170595
12648787
132479057
149509627
1536598497
16141246127
17546433952
182118424887
198227983472
2032010173957
21124715628852
22486550020967
231900433894942
247431033132717
2529085434212042

[0,0,1,5,19,68,243,880,3233,12021,45119,170595,
 648787,2479057,9509627,36598497,141246127,
 546433952,2118424887,8227983472,32010173957,
 124715628852,486550020967,1900433894942,
 7431033132717,29085434212042]