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%I #7 Dec 07 2018 16:38:49
%S 1,2,8,44,308,2660,27764,343604,4948196,81477188,1510645556,
%T 31133831540,705725536868,17441324917508,466571232425012,
%U 13427966856358196,413627214916715492,13576185998718106820,472963964292142718516,17429043637241263344116,677320641352700988657764
%N Row sums of A321627.
%p b := proc(n) option remember; if n = 0 then 2 else
%p add(doublefactorial(2*k-1)*b(n-k), k=1..n) fi end:
%p a := n -> if n = 0 then return 1 else b(n) end: seq(a(n), n=0..20);
%Y Cf. A321627, A193763.
%K nonn
%O 0,2
%A _Peter Luschny_, Dec 07 2018
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