login

A172101 as a triangular array

1
01
011
0111
01221
012421
0136631
01399931
0141218181241
014162436241641
01520406060402051
0152550100100100502551
0163075150200200150753061

A172101 as a square array

1000000000000
111111111111
11223344556
124691216202530
12691824405075
139183660100150
13122460100200
141640100200
142050150
152575
1530
16
1
1000000000000
111111111111
11223344556
124691216202530
12691824405075
139183660100150
13122460100200
141640100200
142050150
152575
1530
16
1