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A191707 as a triangular array

1
25
3710
491315
612171920
81622242625
11212831333230
1427363942413835
183446495352484440
23435862676661565145
2954737884837771645750
37

A191707 as a square array

123468111418232937
57912162127344354
101317222836465873
1519243139496278
20263342536784
253241526683
3038486177
35445671
405164
4557
50
123468111418232937
57912162127344354
101317222836465873
1519243139496278
20263342536784
253241526683
3038486177
35445671
405164
4557
50