91181

Appears in sequences

• A000013 / 2.at n=21A054538
• A000016 / 2.at n=20A054539
• Number of equivalence classes of compositions of n where two compositions a,b are considered equivalent if the summands of a can be permuted into the summands of b with an even number of transpositions.at n=45A218004
• Number of (n+2) X (2+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101.at n=13A260921