Triangle read by rows: T(n,k) (1 <= k <= n) = number of ascendingly generated semigroups of order n with k generators.

A256411

Triangle read by rows: T(n,k) (1 <= k <= n) = number of ascendingly generated semigroups of order n with k generators.

Terms

    a(0) =1a(1) =2a(2) =8a(3) =3a(4) =37a(5) =113a(6) =4a(7) =145a(8) =1257a(9) =3492a(10) =5a(11) =452a(12) =9020a(13) =67394a(14) =183732a(15) =6a(16) =1374a(17) =60826a(18) =938194a(19) =6398792a(20) =17061118a(21) =7a(22) =3933a(23) =356023a(24) =30492722a(25) =466578957a(26) =3032145644a(27) =7743056064

External references