Number of length 1+4 0..n arrays with some pair in every consecutive five terms totalling exactly n.

A246893

Number of length 1+4 0..n arrays with some pair in every consecutive five terms totalling exactly n.

Terms

    a(0) =30a(1) =231a(2) =900a(3) =2701a(4) =6210a(5) =12931a(6) =23400a(7) =40281a(8) =63750a(9) =97951a(10) =142380a(11) =202981a(12) =278250a(13) =376251a(14) =494160a(15) =642481a(16) =816750a(17) =1030231a(18) =1276500a(19) =1571901a(20) =1907730a(21) =2303731a(22) =2748600a(23) =3265801a(24) =3841110a(25) =4502031a(26) =5231100a(27) =6060181a(28) =6968250a(29) =7991851

External references