A025568 a(n) = T(n,n+2) where T is the array defined in A025564.

1, 5, 19, 65, 211, 665, 2058, 6294, 19095, 57607, 173096, 518596, 1550367, 4627455, 13795176, 41088456, 122297643, 363828663, 1081966875, 3216725841, 9561635853, 28418162003, 84455354206, 250982289650, 745860104145, 2216567725281

Offset: 1

Author

Clark Kimberling

Keywords

• nonn

Crossrefs

First differences are pairwise sums of A025181.

Pairwise sums of A014532.