login

A280499 as a triangular array

1
21
301
4201
50301
632001
7000001
84020001
907000301
10560230001
110000000001
1264302000001
13000000000001
147000020000001
1505030000000001

A280499 as a square array

123456789101112131415
10203040506070
1032007604005
100020003000
10000200003
1000302000
103000020
10000000
1000000
100000
10000
1000
100
10
1
123456789101112131415
10203040506070
1032007604005
100020003000
10000200003
1000302000
103000020
10000000
1000000
100000
10000
1000
100
10
1