Number of 0..n arrays x(0..3) of 4 elements without any two consecutive increases or two consecutive decreases.

A200839

Number of 0..n arrays x(0..3) of 4 elements without any two consecutive increases or two consecutive decreases.

Terms

    a(0) =16a(1) =69a(2) =194a(3) =435a(4) =846a(5) =1491a(6) =2444a(7) =3789a(8) =5620a(9) =8041a(10) =11166a(11) =15119a(12) =20034a(13) =26055a(14) =33336a(15) =42041a(16) =52344a(17) =64429a(18) =78490a(19) =94731a(20) =113366a(21) =134619a(22) =158724a(23) =185925a(24) =216476a(25) =250641a(26) =288694a(27) =330919a(28) =377610a(29) =429071

External references