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A114900 as a simple table

na(n)
02
14
28
324
460
5152
6400
71032
82656
96876
1017776
1145912
12118664
13306680
14792480
152047984
165292564
1713677160
1835345112
1991340568
20236046088
21610000528
221576390448
234073776744
2410527631456
2527205966108
2670306845872
27181690021616
28469531293752
291213383282936

[2,4,8,24,60,152,400,1032,2656,6876,17776,45912,
 118664,306680,792480,2047984,5292564,13677160,
 35345112,91340568,236046088,610000528,1576390448,
 4073776744,10527631456,27205966108,70306845872,
 181690021616,469531293752,1213383282936]