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

1,1

Comments

A091908(a(n)) < A091908(a(n)+1).

Links

Table of n, a(n) for n=1..52.

Hugo Pfoertner, Illustration of first term, A091908(19)>A091908(20).

Example

a(1) = 19 because A091908(20)=961 < A091908(19)=972 is the first occurrence of a decrease in A091908.

Crossrefs

Cf. A091908, A092098, A309361.

Sequence in context: A274048 A334093 A120640 * A151768 A270083 A286333

Adjacent sequences: A309357 A309358 A309359 * A309361 A309362 A309363

Keyword

nonn

Author

Hugo Pfoertner, Jul 26 2019

Status

approved