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A218242 as a triangular array

1
33
7157
15636315
2925551125529
57101740954095101757
11340653275365535327534065113
225162572620171048545104854526201716257225
4496502520961291677670533552513167767052096129

A218242 as a square array

137152957113225449
31563255101740651625765025
7635114095327532620172096129
15255409565535104854516776705
29101732753104854533552513
57406526201716776705
113162572096129
225
137152957113225449
31563255101740651625765025
7635114095327532620172096129
15255409565535104854516776705
29101732753104854533552513
57406526201716776705
113162572096129
225