Number of integer compositions of n that (1) have all parts > 1 and (2) are not the first sums of any finite nonnegative sequence.

A391679

Number of integer compositions of n that (1) have all parts > 1 and (2) are not the first sums of any finite nonnegative sequence.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =1a(9) =1a(10) =5a(11) =7a(12) =21a(13) =32a(14) =77a(15) =123a(16) =262a(17) =427a(18) =845a(19) =1390a(20) =2621a(21) =4327a(22) =7891a(23) =13038a(24) =23210a(25) =38327a(26) =67010a(27) =110517a(28) =190571a(29) =313820

External references