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A025568
a(n) = T(n,n+2) where T is the array defined in A025564.
3
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
CROSSREFS
First differences are pairwise sums of A025181.
Pairwise sums of A014532.
Sequence in context: A296330 A304162 A001870 * A001047 A359919 A099448
KEYWORD
nonn
STATUS
approved