login

A220645 as a triangular array

1
20
310
4000
53200
620000
7310000
80000000
976400000
10640000000
117320000000
1240000000000
13972000000000

A220645 as a square array

12345678910111213
010323076749
00201064307
0000040202
000000000
00000000
0000000
000000
00000
0000
000
00
0
12345678910111213
010323076749
00201064307
0000040202
000000000
00000000
0000000
000000
00000
0000
000
00
0