%I #10 Apr 18 2013 02:48:19

%S 1,2,11,12,13,14,15,16,17,18,37,38,39,40,41,42,43,44,45,46,47,48,49,

%T 50,51,52,53,54,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,

%U 103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118

%N Rows 1, 3, 5, 7 of Mendeleyev-Seaborg (extended to 32 columns) periodic table elements.

%C 60 terms. See A137575 (58 terms for rows 2, 4, 6). Differences 9, 19, 33 leads to difference 3 before a(1)=1. Hence -2, antihelium. Like A137583, 2, 2, 8 for A018227, 2, 10, 18, "magic numbers".

%D R. Arsenescu, Antihelium-3 production in lead-lead collisions at 158 A GeV/c. New Journal of Physics 5:1,2003. doi:10.1088/1367-2630/5/1/301.

%Y Cf. A134984, A137913.

%K nonn,fini,full

%O 0,2

%A _Paul Curtz_, Apr 30 2008