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a(n) = (A220500(n) - 1)/2.
0

%I #12 May 06 2024 01:43:59

%S 0,2,6,14,25,37,49,67,87,103,125,157,204,240,268,306,342,358,382,422,

%T 478,548,618,688,772,832,898,982,1101,1185,1245,1323,1391,1407,1431,

%U 1471,1527,1597,1669,1751,1863,1971,2099,2235,2419,2581,2739,2879,3027,3107,3182,3298,3458,3660,3876,4080

%N a(n) = (A220500(n) - 1)/2.

%H 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 <a href="/index/To#toothpick">Index entries for sequences related to toothpick sequences</a>.

%Y Cf. A139250, A220500, A220520, A220522, A220526.

%K nonn

%O 1,2

%A _Omar E. Pol_, Nov 30 2013

%E More terms added using the data at A220500 by _Amiram Eldar_, May 06 2024