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A046899 as a triangular array

1
12
136
141020
15153570
162156126252
172884210462924
183612033079217163432
194516549512873003643512870
1105522071520025005114402431048620
111662861001

A046899 as a square array

11111111111
234567891011
61015212836455566
20355684120165220286
701262103304957151001
25246279212872002
924171630035005
3432643511440
1287024310
48620
11111111111
234567891011
61015212836455566
20355684120165220286
701262103304957151001
25246279212872002
924171630035005
3432643511440
1287024310
48620