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A258910 as a triangular array

512
27362736
118721541611872
51856869688696851856
222400510095659792510095222400
9141122769733527133052713302769733914112
364467214722533386035525841140438603552147225333644672
14254784

A258910 as a square array

51227361187251856222400914112364467214254784
27361541686968510095276973314722533
1187286968659792527133038603552
51856510095527133058411404
222400276973338603552
91411214722533
3644672
51227361187251856222400914112364467214254784
27361541686968510095276973314722533
1187286968659792527133038603552
51856510095527133058411404
222400276973338603552
91411214722533
3644672