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A249544 as a triangular array

1
35
72721
1511921985
3149519111755341
6320151585530583140431365
12781271289915073754893351123475461
255326391040319825545516236015782936789877921845
5111308158355711

A249544 as a square array

137153163127255511
5271194952015812732639130815
2121919111585512899110403198355711
851755305835073758255455
3411404348933516236015
13651123477829367
5461898779
21845
137153163127255511
5271194952015812732639130815
2121919111585512899110403198355711
851755305835073758255455
3411404348933516236015
13651123477829367
5461898779
21845