login

A107131 as a triangular array

1
01
011
0031
00261
00010101
000530151
00003570211
000014140140281
00000126420252361
00000426301050420451
00000046223102310660551

A107131 as a square array

100000000000
11000000000
1320000000
1610500000
110303514000
11570140126420
121140420630462
12825210502310
1364202310
145660
155
1
100000000000
11000000000
1320000000
1610500000
110303514000
11570140126420
121140420630462
12825210502310
1364202310
145660
155
1