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A176476 as a simple table

na(n)
00
11
26
327
4113
5464
61896
77738
831571
9128800
10525455
112143647
128745216
1335676948
14145547524
15593775045
162422362078
179882257735
1840315615409
19164471408184
20670976837020
212737314167774
2211167134898975
2345557394660800
24185855747875875
25758216295635151

[0,1,6,27,113,464,1896,7738,31571,128800,525455,
 2143647,8745216,35676948,145547524,593775045,
 2422362078,9882257735,40315615409,164471408184,
 670976837020,2737314167774,11167134898975,
 45557394660800,185855747875875,758216295635151]