login

A212139 as a triangular array

1
21
331
4621
510431
6156721
721913531
828122210821
93616341818631
10452050303614921
1155257048663223731
12663095721146455201021

A212139 as a square array

123456789101112
1361015212836455566
124691216202530
137132234507095
1251018304872
138183666114
126143264
1392355
12720
1310
12
1
123456789101112
1361015212836455566
124691216202530
137132234507095
1251018304872
138183666114
126143264
1392355
12720
1310
12
1