login

A172371 as a triangular array

0
01
011
0111
01122
011332
0114453
011551084
011661715135
01177262434217
0118837357355349
0119950481361131175512

A172371 as a square array

000000000000
11111111111
1111111111
123456789
23456789
251017263750
3815243548
4133473136
52155113
734117
955
12
000000000000
11111111111
1111111111
123456789
23456789
251017263750
3815243548
4133473136
52155113
734117
955
12