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A271649 as a simple table

na(n)
14
28
316
428
544
664
788
8116
9148
10184
11224
12268
13316
14368
15424
16484
17548
18616
19688
20764
21844
22928
231016
241108
251204
261304
271408
281516
291628
301744
311864
321988
332116
342248
352384
362524
372668
382816
392968
403124
413284
423448
433616
443788
453964
464144
474328
484516
494708
504904
515104
525308
535516

[4,8,16,28,44,64,88,116,148,184,224,268,316,368,
 424,484,548,616,688,764,844,928,1016,1108,1204,
 1304,1408,1516,1628,1744,1864,1988,2116,2248,2384,
 2524,2668,2816,2968,3124,3284,3448,3616,3788,3964,
 4144,4328,4516,4708,4904,5104,5308,5516]