0,19

Table of n, a(n) for n=0..37.

Jason Kimberley, Index of sequences counting connected k-regular simple graphs with girth exactly g

a(n) = A186726(n) - A186727(n).

Cf. A186726, A186727.

Sequence in context: A279548 A279701 A279604 * A208928 A297206 A103709

Adjacent sequences: A186743 A186744 A186745 * A186747 A186748 A186749

nonn,more,hard

Jason Kimberley, Apr 03 2012

a(36)-a(37) from Jinyuan Wang, Mar 02 2020

approved