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%I #13 Oct 02 2022 19:28:20
%S 1,3,9,28,91,307,1067,3792,13702,50148,185416,691277,2595167,9800041,
%T 37194707,141787644,542583488,2083404030,8024142706,30988922366,
%U 119972435149,465505007827,1809877343351,7049866113619,27507668129630
%N Partial sums of A001168.
%C Partial sums of number of fixed polyominoes with n cells, for n > 0.
%H John Mason, <a href="/A176673/b176673.txt">Table of n, a(n) for n = 1..56</a>
%F a(n) = Sum_{i=1..n} A001168(i).
%e a(6) = 1 + 2 + 6 + 19 + 63 + 216 = 307.
%Y Cf. A001168, A000105, A006746, A056877, A006748, A056878, A006747, A006749, A006762.
%K nonn
%O 1,2
%A _Jonathan Vos Post_, Apr 23 2010
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