A028273 Even elements to right of central elements in 3-Pascal triangle A028262.
4, 6, 26, 8, 34, 10, 266, 148, 588, 414, 64, 12, 1002, 76, 2178, 880, 14, 430, 6292, 3718, 118, 16, 10010, 2184, 134, 18, 55198, 39832, 22932, 10388, 3620, 936, 116688, 95030, 62764, 33320, 14008, 4556, 188, 20, 211718, 157794, 96084, 47328, 18564
Offset: 0
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