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A261244
Row sums of A261242: number of connected binary bisymmetric n X n matrices B with B[1,1] = 1 = B[2,2].
1
1, 1, 3, 9, 58, 384
OFFSET
1,3
COMMENTS
For the definition of a connected binary bisymmetric n X n matrix B with the four corners occupied by 1s see the comment under A261242.
CROSSREFS
Cf. A261242.
Sequence in context: A363011 A377359 A105466 * A018504 A340389 A140812
KEYWORD
nonn,more
AUTHOR
STATUS
approved