%I #4 Aug 26 2024 09:52:15

%S 0,1,4,20,108,678,4848,39264,355920,3575640,39454560,474501600,

%T 6178566240,86606881200,1300352981760,20821540239360,354184575816960,

%U 6378546460970880,121243261343500800,2425719783585369600,50955334461183398400,1121303792572973856000,25795667534014525593600

%N a(n) is the rank of row n of A130517 in a lexicographic permutation of [1, ..., n].

%o (PARI) \\ uses functions a130517_row from A130517 and rank from A375302.

%o a(n) = rank(a130517_row(n))

%Y Cf. A130517, A375302.

%K nonn,new

%O 1,3

%A _Hugo Pfoertner_, Aug 26 2024