A391795 Largest possible index of a topological sequence of three dimensional lattice points with depth n.

1, 0, 2, 5, 7, 11, 17, 23, 31, 40, 47, 56

Offset

0,3

Comments

See A387672 for the definition of a topological sequence.

Links

Table of n, a(n) for n=0..11.

Example

Out of the 6 topological sequences with depth 3, {(0, 0, 0), (1, 0, 0), (0, 1, 0)} has the largest index of 5, so a(3) = 5.

Crossrefs

Cf. A000219, A000293, A002836, A207542, A387672.

Sequence in context: A062044 A077128 A106008 * A138244 A326505 A019396

Adjacent sequences: A391792 A391793 A391794 * A391796 A391797 A391798

Keyword

nonn,more

Author

John Tyler Rascoe, Dec 20 2025

Status

approved