# A154589 (b-file synthesized from sequence entry) 0 4 1 -1 2 -2 3 -4 4 -8 5 -16 6 -32 7 -64 8 -128 9 -256 10 -512 11 -1024 12 -2048 13 -4096 14 -8192 15 -16384 16 -32768 17 -65536