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A206188 as a simple table

na(n)
1256
21976
31976
415616
519688
615616
7124048
8205804
9205804
10124048
11986388
122410188
133802676
142410188
15986388
167854572
1730417316
1895187756
1995187756
2030417316
217854572
2262623348
23406202048
242674444796
255674969344
262674444796

[256,1976,1976,15616,19688,15616,124048,205804,
 205804,124048,986388,2410188,3802676,2410188,
 986388,7854572,30417316,95187756,95187756,
 30417316,7854572,62623348,406202048,2674444796,
 5674969344,2674444796]