A047127 T(n,n+2), array T as in A047120.
1, 3, 10, 35, 127, 467, 1736, 6510, 24591, 93427, 356620, 1366586, 5254256, 20259304, 78309078, 303346956, 1177325247, 4577098533, 17821458618, 69484705346, 271251048911, 1060085370591, 4147198630980, 16239629491179
Offset: 0