89729domain: NAppears in sequencesSmallest k for which k, 2k, ... nk all contain the digit 8.at n=11A039939Number of (n+2)X(2+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00010101 or 01010101.at n=13A261286Expansion of (1/x) * Series_Reversion( x * (1-8*x)^2 / (1-7*x) ).at n=4A371369