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Rows 2, 4, 6 of Mendeleyev-Seaborg (extended to 32 columns) periodic table elements.
2

%I #8 Apr 18 2013 02:48:02

%S 3,4,5,6,7,8,9,10,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,

%T 36,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,

%U 77,78,79,80,81,82,83,84,85,86

%N Rows 2, 4, 6 of Mendeleyev-Seaborg (extended to 32 columns) periodic table elements.

%C 58 terms. Companion of A137904(60 terms). Both "well" ordered give 118 terms sequence (increasing) 1 to 118;19-10=9, 55-36=19, a(n) differences lead to difference 3 before a(0)=3. Hence neutral element 0.

%Y Cf. A134984, A135559.

%K nonn,fini,full

%O 0,1

%A _Paul Curtz_, Apr 30 2008