Number of nondecreasing arrangements of n+2 numbers in 0..4 with each number being the sum mod 5 of two others.

A183907

Number of nondecreasing arrangements of n+2 numbers in 0..4 with each number being the sum mod 5 of two others.

Terms

    a(0) =1a(1) =2a(2) =20a(3) =66a(4) =148a(5) =275a(6) =457a(7) =705a(8) =1031a(9) =1448a(10) =1970a(11) =2612a(12) =3390a(13) =4321a(14) =5423a(15) =6715a(16) =8217a(17) =9950a(18) =11936a(19) =14198a(20) =16760a(21) =19647a(22) =22885a(23) =26501a(24) =30523a(25) =34980a(26) =39902a(27) =45320a(28) =51266a(29) =57773

External references