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A139582 as a simple table

na(n)
02
12
24
36
410
514
622
730
844
960
1084
11112
12154
13202
14270
15352
16462
17594
18770
19980
201254
211584
222004
232510
243150
253916
264872
276020
287436
299130
3011208
3113684
3216698
3320286
3424620
3529766
3635954
3743274
3852030
3962370
4074676
4189166
42106348
43126522
44150350
45178268
46211116
47249508
48294546
49347050
50408452

[2,2,4,6,10,14,22,30,44,60,84,112,154,202,270,352,
 462,594,770,980,1254,1584,2004,2510,3150,3916,
 4872,6020,7436,9130,11208,13684,16698,20286,24620,
 29766,35954,43274,52030,62370,74676,89166,106348,
 126522,150350,178268,211116,249508,294546,347050,
 408452]