Number of nonnegative integer arrays of length n summing to n without adjacent values differing by exactly 1.

A187775

Number of nonnegative integer arrays of length n summing to n without adjacent values differing by exactly 1.

Terms

    a(0) =1a(1) =3a(2) =4a(3) =13a(4) =22a(5) =84a(6) =169a(7) =585a(8) =1368a(9) =4352a(10) =11018a(11) =33610a(12) =89097a(13) =265059a(14) =724070a(15) =2122093a(16) =5909279a(17) =17178016a(18) =48426584a(19) =140179658a(20) =398403254a(21) =1150970558a(22) =3289206057a(23) =9495961430a(24) =27241417922a(25) =78650410773a(26) =226250990962a(27) =653512163209

External references