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`%I #5 Mar 30 2012 18:56:53
`

`%S 1,2,3,5,10,20,37,70,140,280,544,1065,2130,4260,8418,16684,33368,
`

`%T 66736,132760,264436,528872,1057744,2110233,4212350,8424700,16849400,
`

`%U 33658512,67254158,134508316,269016632,537715716,1074932056,2149864112
`

`%N Sum{T(i,n-i): i=0,1,...,n}, array T as in A047100.
`

`%K nonn
`

`%O 0,2
`

`%A _Clark Kimberling_
`