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A219668 as a simple table

na(n)
14
226
356
490
5122
6568
72042
88186
932762
1037432
1168652
12299576
132097146
148388602
1519173944
1633554426
1767751984
1878536544824
19306296525088
2015640174780344
2139998905951528
22120948840863188

[4,26,56,90,122,568,2042,8186,32762,37432,68652,
 299576,2097146,8388602,19173944,33554426,67751984,
 78536544824,306296525088,15640174780344,
 39998905951528,120948840863188]