Triangle T(n, k) = n!*q^k/(n-k)! if floor(n/2) > k-1 otherwise n!*q^(n-k)/k!, with q = 3, read by rows.

A174377

Triangle T(n, k) = n!*q^k/(n-k)! if floor(n/2) > k-1 otherwise n!*q^(n-k)/k!, with q = 3, read by rows.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =6a(5) =1a(6) =1a(7) =9a(8) =9a(9) =1a(10) =1a(11) =12a(12) =108a(13) =12a(14) =1a(15) =1a(16) =15a(17) =180a(18) =180a(19) =15a(20) =1a(21) =1a(22) =18a(23) =270a(24) =3240a(25) =270a(26) =18a(27) =1a(28) =1a(29) =21

External references