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A118686 as a triangular array

1
1-1
1-21
1-45-2
1-1029-3212
1-1689-206204-72
1-46569-28766384-61922160
1-761949-1994692664-197712187920-64800
1-28617909-4292364281324-1965715241707440-3952800013608000
1-49677969-419012694420884-918735192

A118686 as a square array

1111111111
-1-2-4-10-16-46-76-286-496
15298956919491790977969
-2-32-206-2876-19946-429236-4190126
12204638492664428132494420884
-72-6192-197712-19657152-918735192
216018792041707440
-64800-39528000
13608000

A118686 as an upper right triangle

1111111111
-1-2-4-10-16-46-76-286-496
15298956919491790977969
-2-32-206-2876-19946-429236-4190126
12204638492664428132494420884
-72-6192-197712-19657152-918735192
216018792041707440
-64800-39528000
13608000

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Last modified June 20 09:27 EDT 2019. Contains 324234 sequences. (Running on oeis4.)