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A226715 as a simple table

na(n)
1491
280043
36045209
4439030021
534404755041
62753775365011
7219013376708219
817350805966693235
91374728293480549343
10108981170244590729059
118640242984064796760609
12684976188236943531208499

[491,80043,6045209,439030021,34404755041,
 2753775365011,219013376708219,17350805966693235,
 1374728293480549343,108981170244590729059,
 8640242984064796760609,684976188236943531208499]