%I #9 Sep 21 2024 02:27:06
%S 1,1,1,2,4,9,22,56,152,428,1257,3827,12023,38975,129801,443833,
%T 1554849,5572334,20409121,76283610,290737945,1128730320,4460079331,
%U 17924115817,73207479057,303691230784,1278796858227,5462983288161,23664467118878,103895077228910
%N Eigensequence of A053121.
%F a(n) = Sum_{k=0..n-1} A053121(n-1,k)*a(k) for n>0 with a(0)=1.
%Y Cf. A053121.
%K nonn
%O 0,4
%A _Philippe Deléham_, Jun 16 2007
%E More terms from _Jason Yuen_, Sep 20 2024