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A113844 as a simple table

na(n)
11
21
31
42
56
618
778
8312
92070
1012420
11163878
121966536
1362213526
141866405780
15206591803854
1622311914816232
179436063264020024
183963146570888410080
199887814229774042889370
2024620657432137366794531300

[1,1,1,2,6,18,78,312,2070,12420,163878,1966536,
 62213526,1866405780,206591803854,22311914816232,
 9436063264020024,3963146570888410080,
 9887814229774042889370,24620657432137366794531300]