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A027420 as a triangular array

1
22
414
7337
1061610
15933915
19146161419
26181033101826
312514616142531
373020103310203037
4336251561615253643
5442312010331020314254

A027420 as a square array

12471015192631374354
21369141825303642
431361014202531
763136101520
1096313610
1514106313
1918141063
2625201510
31302520
373631
4342
54

A027420 as an upper right triangle

12471015192631374354
21369141825303642
431361014202531
763136101520
1096313610
1514106313
1918141063
2625201510
31302520
373631
4342
54

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Last modified May 18 04:58 EDT 2021. Contains 343994 sequences. (Running on oeis4.)