Table for PHFN(k,21,3)

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v:

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t:

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k	N	Source
21	1	_basic
40	2	firstN
126	3	tfrrls
441	4	mols
460	5	column_increase_t3
724	6	symbol_increase
6861	7	symbol_increase
6880	8	column_increase_t3
13720	9	symbol_increase
130323	10	symbol_increase
130342	11	column_increase_t3
260644	12	symbol_increase
2476101	13	symbol_increase

Graph: