Number of length-(3+1) 0..n arrays with new repeated values introduced in sequential order starting with zero.

A268262

Number of length-(3+1) 0..n arrays with new repeated values introduced in sequential order starting with zero.

Terms

    a(0) =9a(1) =42a(2) =143a(3) =378a(4) =837a(5) =1634a(6) =2907a(7) =4818a(8) =7553a(9) =11322a(10) =16359a(11) =22922a(12) =31293a(13) =41778a(14) =54707a(15) =70434a(16) =89337a(17) =111818a(18) =138303a(19) =169242a(20) =205109a(21) =246402a(22) =293643a(23) =347378a(24) =408177a(25) =476634a(26) =553367a(27) =639018a(28) =734253a(29) =839762

External references