A047096 T(n,n+2), array T as in A047089.
1, 3, 11, 38, 139, 506, 1881, 7019, 26449, 100111, 381060, 1455872, 5583063, 21472978, 82810941, 320094718, 1239852777, 4811195125, 18700386300, 72792837115, 283731854748, 1107273926974, 4325975674774, 16918209611354
Offset: 0