90324

Appears in sequences

• Number of k < 10^n such that A047988(k) = 3.at n=5A213532
• The number of partitions of [n] with exactly 4 blocks without peaks.at n=12A289694
• Number of regions in a graph of n adjacent rectangles in a row with all possible diagonals drawn, as in A306302, but without the rectangles' edges which are perpendicular to the row.at n=26A369175