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A131043 as a simple table

na(n)
11
24
316
4106
5861
67216
761938
8541854
94814936
1043336106
11394050419
123612791400
1333353349498
14309745405634
152891246183239
1627107799609004
17255151905596682
182409933230413924
1922832347500212719
20216919281298152512
212066001163137387739
2219721816247905813257

[1,4,16,106,861,7216,61938,541854,4814936,
 43336106,394050419,3612791400,33353349498,
 309745405634,2891246183239,27107799609004,
 255151905596682,2409933230413924,
 22832347500212719,216919281298152512,
 2066001163137387739,19721816247905813257]