A306725 Number of connected strong irreducible digital images of n points up to strong homotopy equivalence.

1, 0, 0, 1, 2, 9, 46, 507, 11800

Offset

1,5

Comments

"Strong irreducible" means not strong homotopy equivalent to an image of fewer points. Each term is greater than or equal to the corresponding term of A248571.

Links

Table of n, a(n) for n=1..9.

P. C. Staecker, Strong homotopy of digitally continuous functions, arxiv:1903.00706 [math.GN], 2019. See table p. 16.

Crossrefs

Cf. A248571.

Sequence in context: A183166 A032331 A049371 * A032079 A002395 A356142

Adjacent sequences: A306722 A306723 A306724 * A306726 A306727 A306728

Keyword

nonn,more

Author

P. Christopher Staecker, Mar 06 2019

Status

approved