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A026648 as a triangular array

1
11
131
1441
16861
17141471
1921362191
11030575730101
1124010811410840121
1135214822222214852131
1156524037055837024065151
116

A026648 as a square array

111111111111
1346791012131516
148142130405265
16143657108148240
172157114222370
1930108222558
11040148370
11252240
11365
115
1
111111111111
1346791012131516
148142130405265
16143657108148240
172157114222370
1930108222558
11040148370
11252240
11365
115
1