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A271270 as a simple table

na(n)
01
11
22
35
414
543
6145
7536
82157
99371
1043630
11216397
121137703
136313675
1436848992
15225464838
161442216870
179620746697
1866781675113
19481413175433
203597627996006
2127825925290597
22222422033403527
231834910286704787
2415603508329713182
25136616625732498989

[1,1,2,5,14,43,145,536,2157,9371,43630,216397,
 1137703,6313675,36848992,225464838,1442216870,
 9620746697,66781675113,481413175433,3597627996006,
 27825925290597,222422033403527,1834910286704787,
 15603508329713182,136616625732498989]