Let r be the matrix {{1,1},{0,1}} and b={{1,0},{1,0}}. Let A be the semigroup generated by r and b. a(n) is the number of words of length n in A.
A121946
Let r be the matrix {{1,1},{0,1}} and b={{1,0},{1,0}}. Let A be the semigroup generated by r and b. a(n) is the number of words of length n in A.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =5a(4) =8a(5) =12a(6) =18a(7) =26a(8) =37a(9) =51a(10) =69a(11) =92a(12) =121a(13) =157a(14) =202a(15) =257a(16) =324a(17) =405a(18) =503a(19) =620a(20) =760a(21) =926a(22) =1122a(23) =1353a(24) =1624a(25) =1941a(26) =2310a(27) =2739a(28) =3235a(29) =3808
External references
- oeis: A121946