Number of binary [ n,5 ] codes.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =6a(6) =23a(7) =77a(8) =240a(9) =705a(10) =1988a(11) =5468a(12) =14724a(13) =39006a(14) =101818a(15) =261924a(16) =663748a(17) =1655781a(18) =4062110a(19) =9793065a(20) =23186825a(21) =53896597a(22) =122975627a(23) =275449464a(24) =605794093a(25) =1308633243a(26) =2777847319a(27) =5797093774a(28) =11900199553a(29) =24042491094