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A218679 as a simple table

na(n)
01
11
25
331
4273
52652
630071
7375628
85135649
975945388
101202006514
1120243446719
12360517872287
136758311053521
14132833835618576
152728019848249377
1658370987166092073
171297916560174624569
1829924140267551540116
19713934350929955200551
2017594768127940813003452

[1,1,5,31,273,2652,30071,375628,5135649,75945388,
 1202006514,20243446719,360517872287,6758311053521,
 132833835618576,2728019848249377,
 58370987166092073,1297916560174624569,
 29924140267551540116,713934350929955200551,
 17594768127940813003452]