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 three.

A190034

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 three.

Terms

    a(0) =2a(1) =6a(2) =10a(3) =27a(4) =33a(5) =107a(6) =80a(7) =349a(8) =264a(9) =735a(10) =357a(11) =2809a(12) =736a(13) =2565a(14) =3262a(15) =10997a(16) =1258a(17) =17921a(18) =2313a(19) =34880a(20) =12649a(21) =17448a(22) =4348a(23) =211004a(24) =15839a(25) =42957a(26) =49372a(27) =169716a(28) =10846a(29) =430082

External references