1,2

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

Eric Weisstein's World of Mathematics, Grid Graph

Eric Weisstein's World of Mathematics, Maximal Irredundant Set

Main diagonal of A291439.

Cf. A286869, A290382, A291098.

Sequence in context: A135538 A296314 A222605 * A222749 A132548 A140521

Adjacent sequences: A290787 A290788 A290789 * A290791 A290792 A290793

nonn,more

Eric W. Weisstein, Aug 17 2017

a(5)-a(6) from Andrew Howroyd, Aug 23 2017

approved