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A027974 as a simple table

na(n)
01
15
214
335
481
5180
6389
7825
81726
93575
107349
1115020
1230561
1361965
14125294
15252795
16509161
171024100
182057549
194130225
208284926
2116609455
2233282989
2366669660
24133507081
25267285605
26535010414
271070731475
282142612801

[1,5,14,35,81,180,389,825,1726,3575,7349,15020,
 30561,61965,125294,252795,509161,1024100,2057549,
 4130225,8284926,16609455,33282989,66669660,
 133507081,267285605,535010414,1070731475,
 2142612801]