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A218870 as a triangular array

2
22
466
6101212
1224283030
204048525454
4092112120124126126
74174210226234238240240
148362438474490498502504504
286700860928960976984988990990
5721448177619161984201620322040204420462046

A218870 as a square array

224612204074148286572
26102440921743627001448
61228481122104388601776
1230521202264749281916
30541242344909601984
541262384989762016
1262405029842032
2405049882040
5049902044
9902046
2046
224612204074148286572
26102440921743627001448
61228481122104388601776
1230521202264749281916
30541242344909601984
541262384989762016
1262405029842032
2405049882040
5049902044
9902046
2046