A129907 a(n) is the greatest prime factor of A072446(n).

1, 2, 3, 7, 683, 10729

Offset

1,2

Comments

The references are about the notion of connectivity spaces (in French, "espaces connectifs").

Links

Table of n, a(n) for n=1..6.

S. Dugowson, Les frontieres dialectiques, Mathematiques et sciences humaines, no. 177, Spring 2007.

S. Dugowson, Representation of finite connective spaces, arXiv:0707.2542 [math.GN], 2007.

Formula

a(n) = A006530(A072446(n)).

Crossrefs

Cf. A006530, A072446.

Sequence in context: A334726 A062615 A180162 * A046284 A077524 A069503

Adjacent sequences: A129904 A129905 A129906 * A129908 A129909 A129910

Keyword

nonn,less,more

Author

S. Dugowson (dugowson(AT)ext.jussieu.fr), Jun 08 2007

Extensions

Edited and a(6) corrected by Andrew Howroyd, Oct 28 2023

Status

approved