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A209491 as a triangular array

1
30
800
20400
4715000
107370000
23887160000
5202006000000
1121448169000000
239199238764000000
505621608652400000000

A209491 as a square array

1382047107238520112123915056
0041537872004489922160
00001660169387865
00000064240
0000000
000000
00000
0000
000
00
0

A209491 as an upper right triangle

1382047107238520112123915056
0041537872004489922160
00001660169387865
00000064240
0000000
000000
00000
0000
000
00
0

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Last modified May 4 21:32 EDT 2024. Contains 372257 sequences. (Running on oeis4.)