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Atomic numbers at the top of the 18 groups of the Mendeleyev-Seaborg table A138724.
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%I #5 Mar 30 2012 18:51:57

%S 1,4,21,22,23,24,25,26,27,28,29,30,5,6,7,8,9,2

%N Atomic numbers at the top of the 18 groups of the Mendeleyev-Seaborg table A138724.

%C This refers to the following 18 elements at the top of their groups: H, Be, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, B, C, N, O, F, He.

%Y Cf. A138718, A135559.

%K nonn,fini,full,less

%O 0,2

%A _Paul Curtz_, May 05 2008