Number of nondecreasing arrangements of n+2 numbers in 0..n with the last equal to n and each after the second equal to the sum of one or two of the preceding four.

A189319

Number of nondecreasing arrangements of n+2 numbers in 0..n with the last equal to n and each after the second equal to the sum of one or two of the preceding four.

Terms

    a(0) =2a(1) =6a(2) =11a(3) =32a(4) =54a(5) =179a(6) =253a(7) =866a(8) =1161a(9) =3234a(10) =4100a(11) =12289a(12) =11179a(13) =28957a(14) =35448a(15) =81956a(16) =60820a(17) =184122a(18) =127607a(19) =389213a(20) =298758a(21) =584334a(22) =434068a(23) =1773649a(24) =705685a(25) =1778949a(26) =1505153a(27) =3979185a(28) =1735705a(29) =7116031

External references