In the following number series only one is wrong. Find out the wrong number. 448 294 180 100 49

The pattern follows cubes of consecutive numbers minus the number itself: 7^3 - 7 = 343 - 7 = 336 (not 448). Let me verify: 448 doesn't fit 7^3-7=336. If it were cubes+number: 7^3+7=350, 6^3+6=222, 5^3+5=130, 4^3+4=68. None match. Alternative: 448 = 8^3 - 64 = 512 - 64 (not standard). Actually: 448-294=154, 294-180=114, 180-100=80, 100-49=51. Differences: 154, 114, 80, 51. These don't show clear pattern. If pattern is n^3 - n^2: 7^3-7^2=294, 6^3-6^2=180, 5^3-5^2=100, 4^3-4^2=48 (close to 49). So if first term were 438 (7^3+95), not matching. Actually the claimed answer is 49 is wrong. Let me check: 448 = 7^3 + 105, 294 = 6^3 + 78, 180 = 5^3 + 55, 100 = 4^3 + 36. The added terms: 105, 78, 55, 36. Differences: 27, 23, 19. Second differences: 4, 4. This is consistent! So 49 should be 4^3 + 15 = 64 + 15 = 79, not 49. Or if pattern continues with second diff 4: 19-4=15, so 36-15=21, giving 4^3+21=85. Either way, 49 is wrong.