A309360 Numbers n such that the number of interior intersection points A091908(n) of the n-intersected triangle decreases when the subdivision of the triangle is refined from n-1 to n cutting line segments.
19, 23, 29, 39, 41, 47, 59, 65, 69, 71, 79, 83, 87, 89, 95, 103, 109, 111, 119, 125, 129, 131, 139, 143, 149, 151, 153, 155, 159, 167, 169, 179, 181, 191, 197, 199, 203, 207, 209, 215, 219, 223, 227, 229, 233, 237, 239, 251, 259, 263, 265, 269
Offset: 1
Keywords
Examples
a(1) = 19 because A091908(20)=961 < A091908(19)=972 is the first occurrence of a decrease in A091908.
Links
- Hugo Pfoertner, Illustration of first term, A091908(19)>A091908(20).
Comments