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A261584 as a simple table

na(n)
01
14
212
336
492
5228
6540
71236
82748
96004
1012876
1127252
1257036
13118308
14243564
15498564
161015484
172060484
184167804
198409588
2016934748
2134049940
2268378220
23137185428
24275026476
25551052676
261103618508
272209525092
284422484764
298850120420
3017707920924

[1,4,12,36,92,228,540,1236,2748,6004,12876,27252,
 57036,118308,243564,498564,1015484,2060484,
 4167804,8409588,16934748,34049940,68378220,
 137185428,275026476,551052676,1103618508,
 2209525092,4422484764,8850120420,17707920924]