Triangle read by rows: T(n,k) is the number of compositions without 2's and having asymmetry degree equal to k (n>=0; 0<=k<=floor(n/4)).

A275442

Triangle read by rows: T(n,k) is the number of compositions without 2's and having asymmetry degree equal to k (n>=0; 0<=k<=floor(n/4)).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =2a(6) =3a(7) =4a(8) =4a(9) =8a(10) =5a(11) =16a(12) =7a(13) =26a(14) =4a(15) =9a(16) =44a(17) =12a(18) =12a(19) =70a(20) =32a(21) =16a(22) =108a(23) =76a(24) =21a(25) =166a(26) =156a(27) =8a(28) =28a(29) =248

External references