login

A049727 as a triangular array

1
22
333
4444
55655
667766
77910977
881011111088
99121315131299
10101316161616131010
1111151719211917151111
121216192122

A049727 as a square array

123456789101112
23456789101112
346791012131516
457101113161719
5691115161921
671013162122
78121619
891317
91015
1011
11
123456789101112
23456789101112
346791012131516
457101113161719
5691115161921
671013162122
78121619
891317
91015
1011
11