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A287618 as a triangular array

1
21
332
3342
44553
445563
5566774
55667784
667788995
66778899105
778899101011116
77889910101111126
889910101111121213137
88991010111112121313147

A287618 as a square array

12334455667788
1334455667788
245566778899
25566778899
367788991010
37788991010
489910101111
49910101111
51011111212
511111212
6121313
61313
714
7
12334455667788
1334455667788
245566778899
25566778899
367788991010
37788991010
489910101111
49910101111
51011111212
511111212
6121313
61313
714
7