23 5 8x15 3 4x25 1 4 July 8, 2019 16 32 64 128 Bestå frame white 23 5 8x15 3 4x25 1 4 4 x 8 x 15 x 16 x 23 x 42 (25 ^ x - 4 * 5 ^ x) ^ 2 + 8 * 5 ^ x 2 * 25 ^ x + 15