49942

Appears in sequences

• Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 or 00000101.at n=23A259768
• a(n) = [2^n csc(1/n)] - [2^n cot(1/n)], where [ ] = floor.at n=20A333188
• Numbers k such that A383844(k) and A383844(k+1) are nonzero.at n=54A384310