pub const INTERNAL_DIAG_MONTY_16: [BabyBear; 16];Expand description
The vector [-2, 1, 2, 1/2, 3, 4, -1/2, -3, -4, 1/2^8, 1/4, 1/8, 1/2^27, -1/2^8, -1/16, -1/2^27] saved as an array of BabyBear elements. Copied from plonky3’s Poseidon2
implementation to preserve the exact constraint structure.