Number of integer compositions of n with all parts > 1 that are not the first sums of any composition.

A391681

Number of integer compositions of n with all parts > 1 that are not the first sums of any composition.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =1a(7) =1a(8) =5a(9) =7a(10) =19a(11) =30a(12) =65a(13) =106a(14) =207a(15) =340a(16) =626a(17) =1029a(18) =1825a(19) =2996a(20) =5182a(21) =8490a(22) =14431a(23) =23594a(24) =39608a(25) =64634a(26) =107522a(27) =175171a(28) =289453a(29) =470919

External references