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A204206 as a triangular array

3
57
91215
17212731
3338485863
657186106121127
129136157192227248255
257265293349419475503511
51352255864276889497810141023
1025103510801200141016621872

A204206 as a square array

3591733651292575131025
7122138711362655221035
152748861572935581080
31581061923496421200
631212274197681410
1272484758941662
2555039781872
5111014
1023
3591733651292575131025
7122138711362655221035
152748861572935581080
31581061923496421200
631212274197681410
1272484758941662
2555039781872
5111014
1023