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

1, 2, 3, 7, 683, 10729

Offset: 1

Author

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

Keywords

• nonn
• less
• more

Comments

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

Links

• 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.

Crossrefs

Cf. A006530, A072446.

Formula

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

Extensions

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