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A206521 as a triangular array

15
186186
2786109982786
4380469554169554143804
6973694435008617709773844350086697369
1113654428306652134514236739845142367398283066521311136544
17797785118068923950411507555684346

A206521 as a square array

1518627864380469736911136544177977851
18610998695541443500862830665213180689239504
27866955411770977384514236739811507555684346
438044435008645142367398
6973692830665213
11136544

A206521 as an upper right triangle

1518627864380469736911136544177977851
18610998695541443500862830665213180689239504
27866955411770977384514236739811507555684346
438044435008645142367398
6973692830665213
11136544

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Last modified September 11 10:08 EDT 2024. Contains 375827 sequences. (Running on oeis4.)