A351698 24*a(n)+1 is the numerator of the squared circumradius of a cyclic quadrilateral with sides n, n+1, n+2, n+3.

16, 137, 72, 2210, 6097, 1611, 30882, 60405, 12267, 190927, 315341, 55665, 769895, 1149580, 185985, 2383791, 3328572, 507402, 6166615, 8208662, 1198386, 14003642, 17984950, 2540862, 28808442, 35982891, 4954230, 54843640, 66993635, 9034245, 98085416, 117653107, 15596757

Offset: 1

Author

Hugo Pfoertner, Feb 26 2022

Keywords

• nonn

Crossrefs

Cf. A351696, A351697 (denominators).

Formula

a(n) = (A351696(n) - 1)/24.