1*4-1=3 3*8-1=23 23*16-1=367 367*32-1=11743
the logic is, 1*2^1 -1=1; 1*2^2 -1=3; 3*2^3 -1=23; 23*2^4 -1=367; 367*2^5 -1=11743; so ans is 11743.
The sequence is generated as follows: 1 (1 * 4 ) - 1 = 3 ( 3 * 8 ) - 1 = 23 (23*16)-1 = 367
(367 *32) - 1 = 11743
The answer is 11743