Modified cyclic phone booth sequence: number of ways to occupy n labeled phone booths in a circle one by one, each time picking a phone booth adjacent to the smallest number of previously occupied phone booths.

A192009

Modified cyclic phone booth sequence: number of ways to occupy n labeled phone booths in a circle one by one, each time picking a phone booth adjacent to the smallest number of previously occupied phone booths.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =8a(4) =40a(5) =168a(6) =504a(7) =3456a(8) =15552a(9) =97920a(10) =620928a(11) =4465152a(12) =31449600a(13) =273369600a(14) =2172096000a(15) =20968243200a(16) =192753561600

External references