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Diagonal sums of a Collatz triangle.
1

%I #2 Mar 30 2012 18:59:21

%S 1,2,5,10,10,13,16,25,40,42,51,49,65,58,83,94,108,143,141,208,184,294,

%T 241,333,319,486,424,689,559,959,744,1082,990,1251,1319,1470,1478,

%U 1765,2047,2144,2330,2649,2707,2900,2874,3011,3096,3455

%N Diagonal sums of a Collatz triangle.

%C Diagonal sums of A138895.

%F a(n)=sum{k=0..floor(n/2), A092892(n-2k)}

%K easy,nonn

%O 0,2

%A _Paul Barry_, Mar 31 2008, Apr 02 2008