a(n) = n! * Sum_{k=0..floor(n/4)} (n/24)^k /(k! * (n-4*k)!).

A362317

a(n) = n! * Sum_{k=0..floor(n/4)} (n/24)^k /(k! * (n-4*k)!).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =26a(6) =91a(7) =246a(8) =2801a(9) =26650a(10) =159601a(11) =702406a(12) =12479941a(13) =172561676a(14) =1462655195a(15) =8918930476a(16) =215370384321

External references