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A081322 as a simple table

na(n)
00
11
21
35
4144
5514229
6190392490709135
793202207781383214849429075266681969
88269366108663463411004717981412027167937978847386801205243459016220834185059487057696

[0,1,1,5,144,514229,190392490709135,
 93202207781383214849429075266681969,
 82693661086634634110047179814120271679379788473868\
 01205243459016220834185059487057696]