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A377661 as a triangular array

1
21
581
1645181
65256180321
32616251600500501
1957117361462564001125721
137009589314376679625196002205981
109601876800153428810223363185005017639201281

A377661 as a square array

1251665326195713700109601
184525616251173695893876800
1181801600146251437661534288
1325006400796251022336
150112519600318500
172220550176
1983920
1128
1
1251665326195713700109601
184525616251173695893876800
1181801600146251437661534288
1325006400796251022336
150112519600318500
172220550176
1983920
1128
1