1 in notes

ne'oi _VUhU3 experimental cmavo

unary operator: primorial a#

The product of the first pi(a) prime numbers p_i starting with p₁ = 2, where pi(a) is the (not-greater-than-)prime-counting function. Not strictly monotonically increasing unless a=p_j for positive integers j.

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In notes:

ne'o'o

mekso quaternary operator – Pochhammer symbol: with/for input (X_{1, X}, this word/function outputs \prod_k = 0^X_{2 - 1 (X}; by default, X₄ = 1 unless explicitly defined otherwise.