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A320967 as a simple table

na(n)
01
14
212
336
492
5220
6508
71108
82332
94776
109492
1118420
1235036
1365324
14119708
15216044
16384204
17674236
181168968
192003460
203397300
215704148
229487740
2315642676
2425577900
2541495032
2666817812
27106837112
28169677372
29267755836
30419948980
31654799316
321015276412
331565765892

[1,4,12,36,92,220,508,1108,2332,4776,9492,18420,
 35036,65324,119708,216044,384204,674236,1168968,
 2003460,3397300,5704148,9487740,15642676,25577900,
 41495032,66817812,106837112,169677372,267755836,
 419948980,654799316,1015276412,1565765892]