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A213774 as a triangular array

1
53
14115
3126177
615338239
1129975502911
19717613797623513
337303240175119744115
566511409304213141864717
939850685515368251163985319
154514011134

A213774 as a square array

151431611121973375669391545
3112653991763035118501401
51738751372404096851134
7235097175304515
92962119213368
113574141251
134186163
154798
1753
19
151431611121973375669391545
3112653991763035118501401
51738751372404096851134
7235097175304515
92962119213368
113574141251
134186163
154798
1753
19