Irregular triangle by rows derived from variants of Cartan matrices: 1's in the super and subdiagonals and 3,4,4,4,... in the main diagonal alternating with 4,4,4,...
A180062
Irregular triangle by rows derived from variants of Cartan matrices: 1's in the super and subdiagonals and 3,4,4,4,... in the main diagonal alternating with 4,4,4,...
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =1a(5) =4a(6) =1a(7) =7a(8) =11a(9) =1a(10) =8a(11) =15a(12) =1a(13) =11a(14) =38a(15) =41a(16) =1a(17) =12a(18) =46a(19) =56a(20) =1a(21) =15a(22) =81a(23) =186a(24) =153a(25) =1a(26) =16a(27) =93a(28) =232a(29) =209
External references
- oeis: A180062