Number of configurations of the 7 X 2 variant of the sliding block 15-puzzle that require a minimum of n moves to be reached, starting with the empty square in one of the corners.

A346736

Number of configurations of the 7 X 2 variant of the sliding block 15-puzzle that require a minimum of n moves to be reached, starting with the empty square in one of the corners.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =6a(4) =11a(5) =20a(6) =37a(7) =67a(8) =117a(9) =198a(10) =329a(11) =557a(12) =942a(13) =1575a(14) =2597a(15) =4241a(16) =6724a(17) =10535a(18) =16396a(19) =25515a(20) =39362a(21) =60532a(22) =92089a(23) =138969a(24) =207274a(25) =307725a(26) =453000a(27) =664240a(28) =964874a(29) =1392975

External references