Number of nontrivial compositions of differential operations and directional derivative of the n-th order on the space R^10.

A187179

Number of nontrivial compositions of differential operations and directional derivative of the n-th order on the space R^10.

Terms

    a(0) =7a(1) =7a(2) =8a(3) =9a(4) =11a(5) =14a(6) =19a(7) =27a(8) =40a(9) =61a(10) =95a(11) =150a(12) =239a(13) =383a(14) =616a(15) =993a(16) =1603a(17) =2590a(18) =4187a(19) =6771a(20) =10952a(21) =17717a(22) =28663a(23) =46374a(24) =75031a(25) =121399a(26) =196424a(27) =317817a(28) =514235a(29) =832046

External references