Death number

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Death numbers Dn or D(n) are constructed as follows.

D1 = 1;

D2 = 4;

Dm = [Dm-1,Dm-1] in simple Googolological Notation, for all m ≥ 3.

These numbers are so named since their expansions consist only of 4's, which represent death in East Asian numerology.

Larger Numbers
We can create a "super sequence" DD n , such as D(D(3)), where D(3) = D3 = supertet.