JavaScript (V8), 131 bytes
[].fill.constructor`M${`for(N\x3D1\x3bM\x3bn-N||--M-print(n\x29\x29for(n\x3Di\x3DN-\x3D-1\x3bi-->2\x3b\x29n\x2fi-~~[n\x2fi]||n--`}`
l4m2
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