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A143391 as a simple table

na(n)
14
24
36
420
54845
622201944189472719
7166346452361171550314824489703019621783015631944522524541726975745905615181160551330988078433117

[4,4,6,20,4845,22201944189472719,
 16634645236117155031482448970301962178301563194452\
 2524541726975745905615181160551330988078433117]