The list of 16-bit LFSRs has 2048 entries. This page contains lists of feedback constants that work with LFSRs of different lengths. (Note: There is no XOR gate feeding into bit 16 because there is no input from bit 17.) Other LFSRs:
The quickest way of doing this is by calculating the XOR product of the 16-bit shift register with 0xB400, which has all of these bits set (1011010000000000 in binary). When this bit is zero, this has no effect, but when it is 1, all these bits are flipped. The least significant bit extracted from the end of the shift register is fed back by XOR-ing it with bits 16, 14, 13 and 11.
The Wikipedia article you got this from has an illustration that explains what the code is doing:
