Constant BABYBEAR_POSEIDON2_RC_24_EXTERNAL_INITIAL 

pub const BABYBEAR_POSEIDON2_RC_24_EXTERNAL_INITIAL: [[BabyBear; 24]; 4];

Round constants for width-24 Poseidon2 on BabyBear.

Generated by the Grain LFSR with parameters: field_type=1, alpha=7 (exp_flag=0), n=31, t=24, R_F=8, R_P=21

Generated by poseidon2/generate_constants.py --field babybear --width 24.

Layout: external_initial (4 rounds × 24 elements).