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The check matrix of a [20,15,5]8.

The generator matrix of a [20,5,14]8.

10000641604271154766
01000246065371436534
00100220321374543427
00010103121365127352
00001011111111111111

The prime polynomial used to generate GF(8) is: X3+X2+1. The element f=aX2+bX+c, a,b,c in {0,1}, is written as the number a*4+b*2+c.

The weight distribution:

A'0= 1, A'14= 1155, A'15= 2457, A'16= 4305, A'17= 6930, A'18= 8575, A'19= 7525, A'20= 1820.

A0= 1, A5= 9387, A6= 139755, A7= 1941555, A8= 22141665, A9= 206970855, A10= 1592501911, A11= 10134972575, A12= 53211586155, A13= 229209441825, A14= 802247687745, A15= 2246279474649, A16= 4913745537330, A17= 8093223829005, A18= 9442095683965, A19= 6957333446805, A20= 2435066723649.


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