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%I
%S 1,6,78,1266,23010,448062,9140118,192804954,4171347258,92051810934,
%T 2063947865694,46885775086338,1076785174781394,24959959877000238,
%U 583201632981980454,13721408509737851754,324797812150741560618,7729580015834558984934,184829586432121709114478
%N Series reversion of x(1-7x)/(1-x) .
%C The Hankel transform of this sequence is 42^C(n+1,2) .
%F a(n) = Sum_{k, 0<=k<=n}A086810(n,k)*6^k .
%o (PARI) Vec(serreverse(x*(1-7*x)/(1-x)+O(x^66))) /* _Joerg Arndt_, Feb 06 2013 */
%K nonn
%O 1,2
%A _Philippe DELEHAM_, Oct 29 2007
%E More terms from _Philippe Deléham_, Feb 06 2013
%E Offset corrected, _Joerg Arndt_, Feb 15 2013
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