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%I #4 Aug 09 2019 07:02:00
%S 1,1,-4,-10,1632,8310,-7075840,-54055300,133263011840,1357405850150,
%T -7330399048433664,-93333539435856300,938251671132331573248,
%U 14335429567126748300220,-241103496704735670335176704,-4297755089297257698287154120,112148700684200928841718342615040
%N Central column of A326721.
%Y Cf. A326721, A326722.
%K sign
%O -1,3
%A _Peter Luschny_, Aug 08 2019