15054368domain: NAppears in sequencesT(n,0) + T(n,1) + ... + T(n,n), T given by A026648.at n=22A026655a(n) = T(n,0) + T(n,1) + ... + T(n,[ n/2 ]), T given by A026648.at n=23A026656Number of words of length n over the alphabet {1,2,3,4,5} such that 1 is not followed by an odd letter.at n=11A123347