1, 3, 6, 15, 26, 63, 106, 255, 426, 1023, 1710, 4091, 6820, 16382, 27307, 65532, 109226, 262143, 437992, 1047480, 1746024, 4193944, 6990824, 16776408, 27962088, 67108824, 112126184, 268155096, 446982376, 1073658072, 1789651176, 4294719704, 7158245608