A203693 - cp's OEIS frontend

A203693 Vandermonde sequence using x^2 - xy + y^2 applied to the first n triangular numbers: 1,3,6,10,...,n(n+1)/2.

n	a(n)
1	1
2	7
3	5859
4	3201146676
5	3820181459144204700
6	25381616622722369500521817413900
7	2012800150183968180465350145758736863679028900800
8	3623820214658807704726540455788270697258988626189027049678195383091200

[1, 7, 5859, 3201146676, 3820181459144204700, 25381616622722369500521817413900, 2012800150183968180465350145758736863679028900800, 3623820214658807704726540455788270697258988626189027049678195383091200]

cp's OEIS Frontend

A203693 Vandermonde sequence using x^2 - xy + y^2 applied to the first n triangular numbers: 1,3,6,10,...,n(n+1)/2.

Table of values

List of values