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

1,5

Links

Table of n, a(n) for n=1..20.

Formula

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

Crossrefs

Cf. A002218, A002840, A289470, A343869.

Sequence in context: A328779 A039826 A221547 * A289470 A368564 A213385

Adjacent sequences: A289468 A289469 A289470 * A289472 A289473 A289474

Keyword

nonn,more

Author

Ed Pegg Jr, Jul 06 2017

Extensions

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

Status

approved