A101820 Triangle read by rows: T(n,h)/(n-1), where T is the array in A101819.

1, 1, 3, 1, 14, 12, 1, 45, 150, 60, 1, 124, 1080, 1560, 360, 1, 315, 6020, 21000, 16800, 2520, 1, 762, 28980, 204120, 378000, 191520, 20160, 1, 1785, 127050, 1631700, 5838840, 6667920, 2328480, 181440, 1, 4088, 522480, 11459280, 71442000

Offset

0,3

Links

Table of n, a(n) for n=0..40.

Paul Barry, The Gamma-Vectors of Pascal-like Triangles Defined by Riordan Arrays, arXiv:1804.05027 [math.CO], 2018.

Formula

T(n, h) = C(n-1, h)*U(n, h)/(n-1), where U(n, h) is the array in A019538.

Example

First rows:
1
1 3
1 14 12
4 45 150 60

Crossrefs

Cf. A019538, A101817, A101819, A101821.

Sequence in context: A079640 A079638 A018858 * A055301 A286704 A286080

Adjacent sequences: A101817 A101818 A101819 * A101821 A101822 A101823

Keyword

nonn,tabl

Author

Clark Kimberling, Dec 17 2004

Status

approved