A173398 - OEIS

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A173398

(A007318 + A112468)/2

%I #3 Nov 03 2016 07:41:40

%S 1,1,1,1,1,1,1,1,2,1,1,1,4,2,1,1,1,7,4,3,1,1,1,11,7,9,3,1,1,1,16,11,

%T 22,9,4,1,1,1,22,16,46,22,16,4,1,1,1,29,22,86,46,50,16,5,1,1,1,37,29,

%U 148,86,130,50,25,5,1

%N (A007318 + A112468)/2

%C If first row is omitted,same as A131054.

%e Array starts:

%e 1,1,1,1

%e 1,1,2,2

%e 1,1,4,4

%e 1,1,7,7

%Y Cf. A007318, A112468, A131054

%K nonn,tabl

%O 1,9

%A _Mark Dols_, Feb 17 2010, Feb 21 2010