78895domain: NAppears in sequencesNumber of (n+1) X 7 0..2 matrices with each 2 X 2 subblock idempotent.at n=15A224674a(n) = floor(a(n-1)*3/2) bitwise-OR LSB(a(n-1)*n), with a(1)=2 (LSB = Least Significant Bit).at n=26A333589