Number of length 5+4 0..n arrays with no pair in any consecutive five terms totalling exactly n.
A246742
Number of length 5+4 0..n arrays with no pair in any consecutive five terms totalling exactly n.
Terms
- a(0) =2a(1) =40a(2) =2436a(3) =19992a(4) =231414a(5) =1152576a(6) =6272072a(7) =22219408a(8) =79002090a(9) =220032120a(10) =600454092a(11) =1407554280a(12) =3218159966a(13) =6646694992a(14) =13405336464a(15) =25160170656a(16) =46234874322a(17) =80560371528a(18) =137811490580a(19) =226332464440a(20) =365838595782
External references
- oeis: A246742