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A hierarchical sequence (W3{2,2}*c - see A059126).
1

%I #12 Sep 13 2022 09:31:28

%S 4,7,4,7,10,7,4,7,4,10,13,10,4,7,4,7,10,7,4,7,4,13,16,13,4,7,4,7,10,7,

%T 4,7,4,10,13,10,4,7,4,7,10,7,4,7,4,16,19,16,4,7,4,7,10,7,4,7,4,10,13,

%U 10,4,7,4,7,10,7,4,7,4,13,16,13,4,7,4,7,10,7,4,7,4,10,13,10,4,7,4,7,10

%N A hierarchical sequence (W3{2,2}*c - see A059126).

%H Jonas Wallgren, <a href="/A059126/a059126.txt">Hierarchical sequences</a>

%F a(n) = A059131(3*n) + A059131(3*n+1) + A059131(3*n+2). - _Sean A. Irvine_, Sep 13 2022

%Y Cf. A001511, A059126, A059131, A059144, A059145.

%K easy,nonn

%O 0,1

%A _Jonas Wallgren_, Jan 19 2001