Triangle of numbers S(n,k) (0 <= k <= n) arising in the enumeration of interval orders without duplicated holdings.

A259876

Triangle of numbers S(n,k) (0 <= k <= n) arising in the enumeration of interval orders without duplicated holdings.

Terms

    a(0) =1a(1) =1a(2) =-1a(3) =3a(4) =-3a(5) =1a(6) =21a(7) =-21a(8) =7a(9) =-1a(10) =315a(11) =-315a(12) =105a(13) =-15a(14) =1a(15) =9765a(16) =-9765a(17) =3255a(18) =-465a(19) =31a(20) =-1a(21) =615195a(22) =-615195a(23) =205065a(24) =-29295a(25) =1953a(26) =-63a(27) =1a(28) =78129765a(29) =-78129765

External references