login

A130070 as a triangular array

2
12
302
4102
90002
731002
15000002
124010002
1803000002
17900100002

A130070 as a square array

21349715121817
201030409
20010030
2000100
200001
20000
2000
200
20
2
21349715121817
201030409
20010030
2000100
200001
20000
2000
200
20
2