A029647 Even numbers to the left of the central elements of the (1,2)-Pascal triangle A029635.

4, 6, 14, 20, 8, 50, 10, 44, 112, 182, 54, 156, 294, 12, 210, 450, 672, 660, 1122, 14, 90, 352, 1782, 2508, 104, 442, 4290, 16, 546, 4004, 9438, 18, 152, 800, 2940, 8008, 16744, 27456, 35750, 170, 952, 3740, 10948, 24752, 44200, 63206, 20, 1122, 4692