For reference, here is the corresponding table of all 16 functions, from Knuth: https://imgur.com/a/Xb2HysB https://imgur.com/a/Xb2HysB (TAOCP Vol 4A, earlier

For reference, here is the corresponding table of all 16 functions, from Knuth: https://imgur.com/a/Xb2HysB https://imgur.com/a/Xb2HysB (TAOCP Vol 4A, earlier draft of this part online at https://cs.stanford.edu/~knuth/fasc0b.ps.gz https://cs.stanford.edu/~knuth/fasc0b.ps.gz.)