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A115506 Number of permutations where every element in binary notation has ones at the same or adjacent positions of previous element's binary ones. 3

%I #16 Mar 21 2023 09:07:02

%S 1,2,6,8,24,168,840,1008,4032,32160,192960,1297440,9082080,126846720,

%T 1141620480,1243468800,4490307360,53812332000,526257365760,

%U 3736568586240,33629117276160,539852417395200,5938376591347200,43328496719692800,612865454506905600,12864962752408166400,204270526971128217600,2666714307922074009600,40000714618831110144000

%N Number of permutations where every element in binary notation has ones at the same or adjacent positions of previous element's binary ones.

%C Suggested by _Leroy Quet_.

%Y Cf. A115507, A115508, A115509.

%K nonn

%O 1,2

%A _Max Alekseyev_, Jan 31 2006

%E a(21)-a(29) from _Max Alekseyev_, Mar 21 2023

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Last modified March 29 09:59 EDT 2024. Contains 371268 sequences. (Running on oeis4.)