200008
domain: N
Appears in sequences
- Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 or 00000011.at n=12A259718
- Number x = concat(MSD(x),b) such that MSD(x)*b = d(x), where MSD(x) is the Most Significant Digit of x and d(x) is the number of divisors of x.at n=14A291618
- Number of chordless cycles in the n-triangular grid graph.at n=9A297671