A289471 Number of planar strictly 2-connected graphs on n edges.

1, 0, 1, 1, 2, 3, 7, 15, 39, 106, 316, 1030, 3553, 13006, 49780, 197281, 804649, 3358885, 14289507, 61769577

Offset: 1

Author

Ed Pegg Jr, Jul 06 2017

Keywords

• nonn
• more

Crossrefs

Cf. A002218, A002840, A289470, A343869.

Formula

a(n) = A343869(n) - A002840(n). - Andrew Howroyd, May 04 2021

Extensions

a(12)-a(13) corrected and a(14)-a(20) from Andrew Howroyd, May 04 2021