Number of palindromic and unimodal compositions of n. Equivalently, the number of orbits under conjugation of even nilpotent n X n matrices.
A096441
Number of palindromic and unimodal compositions of n. Equivalently, the number of orbits under conjugation of even nilpotent n X n matrices.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =4a(4) =3a(5) =7a(6) =5a(7) =11a(8) =8a(9) =17a(10) =12a(11) =26a(12) =18a(13) =37a(14) =27a(15) =54a(16) =38a(17) =76a(18) =54a(19) =106a(20) =76a(21) =145a(22) =104a(23) =199a(24) =142a(25) =266a(26) =192a(27) =357a(28) =256a(29) =472
External references
- oeis: A096441