The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A000840 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A000840

Number of cubic bicolored graphs on n unlabeled nodes admitting an automorphism exchanging the colors.
(history; published version)

#18 by Alois P. Heinz at Wed Mar 11 19:01:32 EDT 2020

STATUS

proposed

approved

#17 by Andrew Howroyd at Wed Mar 11 18:55:13 EDT 2020

STATUS

editing

proposed

#16 by Andrew Howroyd at Wed Mar 11 18:53:10 EDT 2020

DATA

0, 0, 1, 1, 2, 5, 12, 31, 90, 285, 938, 3285, 11983, 45390, 177803, 718390, 2986407, 12749364, 55802982, 250068732, 1145923828, 5363795830, 25620207380, 124767647097, 618983876918, 3126035142910, 16060182735947, 83883575376862, 445164927249466, 2399098651337048

KEYWORD

nonn,more,changed

EXTENSIONS

a(11)-a(2730) from Andrew Howroyd, Mar 10 2020

#15 by Andrew Howroyd at Wed Mar 11 11:20:19 EDT 2020

DATA

EXTENSIONS

a(11)-a(2427) from Andrew Howroyd, Mar 10 2020

#14 by Andrew Howroyd at Tue Mar 10 22:34:04 EDT 2020

CROSSREFS

Column k=3 of A333159.

Cf. A000512, A000843, A004066, A008325.

#13 by Andrew Howroyd at Tue Mar 10 21:29:34 EDT 2020

NAME

Number of cubic bicolored graphs on n unlabeled nodes admitting an automorphism exchanging the colors.

#12 by Andrew Howroyd at Tue Mar 10 21:26:59 EDT 2020

DATA

0, 0, 1, 1, 2, 5, 12, 31, 90, 285, 938, 3285, 11983, 45390, 177803, 718390, 2986407, 12749364, 55802982, 250068732, 1145923828, 5363795830, 25620207380, 124767647097

EXTENSIONS

a(11)-a(24) from Andrew Howroyd, Mar 10 2020

STATUS

approved

editing

#11 by Joerg Arndt at Thu May 09 11:17:04 EDT 2013

STATUS

editing

approved

#10 by Joerg Arndt at Thu May 09 11:17:01 EDT 2013

KEYWORD

nonn,more

STATUS

approved

editing

#9 by R. J. Mathar at Sat Jul 14 18:03:21 EDT 2012

STATUS

editing

approved