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

1,2

Links

Table of n, a(n) for n=1..26.

Crossrefs

First differences are pairwise sums of A025181.

Pairwise sums of A014532.

Sequence in context: A296330 A304162 A001870 * A001047 A359919 A099448

Adjacent sequences: A025565 A025566 A025567 * A025569 A025570 A025571

Keyword

nonn

Author

Clark Kimberling

Status

approved