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A184409 Total number of missing toothpicks in the holes in the toothpick structure of A182840.

%I A184409 #24 Jul 20 2019 14:21:53
%S A184409 0,0,0,0,0,0,0,2,6,6,6,6,6,8,12,22,42,42,42,42,42,42,42,46,58,68,72,
%T A184409 72,72,100,148,150,186,186,186,186,186,186,186,190,202,210,210,210,
%U A184409 210,214,226,254,314,356,360,360,360,360,360,368,396,524,708,652,628,676,764,710,762,762,762,762,762,762,762,766
%N A184409 Total number of missing toothpicks in the holes in the toothpick structure of A182840.
%C A184409 Each connected group of unoccupied lines in the hexagonal structure enclosed by toothpicks counts as a hole.
%H A184409 Olaf Voß, <a href="/A184409/b184409.txt">Table of n, a(n) for n = 0..625</a>
%H A184409 N. J. A. Sloane, <a href="/wiki/Catalog_of_Toothpick_and_CA_Sequences_in_OEIS">Catalog of Toothpick and Cellular Automata Sequences in the OEIS</a>
%H A184409 Olaf Voß, <a href="/wiki/Toothpick_structures_on_hexagonal_net">Toothpick structures on hexagonal net</a>
%H A184409 <a href="/index/To#toothpick">Index entries for sequences related to toothpick sequences</a>
%e A184409 Structure after step 8:
%e A184409       \_/
%e A184409     \_/ \_/
%e A184409   \_/ \_/ \_/
%e A184409 \_/  _/ \_  \_/
%e A184409 / \_/ \_/ \_/ \
%e A184409 \_/ \_/ \_/ \_/
%e A184409 / \ / \_/ \ / \
%e A184409 \_/ \_/ \_/ \_/
%e A184409 / \_/ \_/ \_/ \
%e A184409 \_/ \_/ \_/ \_/
%e A184409 / \_  \_/  _/ \
%e A184409   / \_/ \_/ \
%e A184409     / \_/ \
%e A184409       / \
%e A184409 There are 6 holes in this structure, in each 1 toothpick is missing, so a(8)=6.
%Y A184409 For number of holes see A184408.
%K A184409 nonn
%O A184409 0,8
%A A184409 _Olaf Voß_, Jan 13 2011