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A212686 as a simple table

na(n)
00
10
24
38
424
540
676
7112
8176
9240
10340
11440
12584
13728
14924
151120
161376
171632
181956
192280
202680
213080
223564
234048
244624
255200
265876
276552
287336
298120
309020
319920
3210944
3311968
3413124
3514280
3615576
3716872
3818316
3919760
4021360
4122960

[0,0,4,8,24,40,76,112,176,240,340,440,584,728,924,
 1120,1376,1632,1956,2280,2680,3080,3564,4048,4624,
 5200,5876,6552,7336,8120,9020,9920,10944,11968,
 13124,14280,15576,16872,18316,19760,21360,22960]