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%I #13 May 13 2021 01:34:10
%S 0,2,2,4,6,13,35,171,1934,97151,52942129,1435382350480,
%T 21191828466255176653
%N Lionel-Levine-sequence generated by (2,0).
%e a(3) = 4: (2,0),(2,2),(1,1,2,2),(1,1,2,2,3,4)
%Y Cf. A011784, A061892, A061895.
%K nonn,easy
%O 0,2
%A _Frank Ellermann_, May 13 2001
%E a(10) from _Naohiro Nomoto_, May 10 2002
%E a(11) and a(12) from _Michael Anthony Keyes_, May 12 2021
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