In some backends (especially the SPICE backend), gnetlist will output pins in the order of increasing pin sequence. The sequence numbers start at 1 and should increase without skipping any numbers. This attribute is not the pin number (i.e. device pin numbers, like GND is 7 on TTL). For pin numbers see the pinnumber (3.7) attribute.
Examples: pinseq=1 pinseq=2 pinseq=3
This attribute replaces the obsolete pin#=# attribute.