Number of generalized compositions of n: words b_1^{i_1}b_2^{i_2}...b_k^{i_k} such that b_j's and j_i's are positive integers and sum b_j*i_j = n.

A129921

Number of generalized compositions of n: words b_1^{i_1}b_2^{i_2}...b_k^{i_k} such that b_j's and j_i's are positive integers and sum b_j*i_j = n.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =7a(4) =18a(5) =43a(6) =108a(7) =263a(8) =651a(9) =1599a(10) =3942a(11) =9698a(12) =23890a(13) =58805a(14) =144806a(15) =356512a(16) =877820a(17) =2161285a(18) =5321485a(19) =13102246a(20) =32259890a(21) =79428762a(22) =195566238a(23) =481514453a(24) =1185564348a(25) =2919044646a(26) =7187145712a(27) =17695877607a(28) =43570023304a(29) =107276219947

External references