22408

Appears in sequences

• Number of (binary) bit strings in which no even length block of 0's is followed by an even length block of 1's.at n=15A065494
• Number of unlabeled rooted 2,3 cacti (triangular cacti with bridges).at n=10A091486
• The first four numbers of this sequence are the primes 2,3,5,7. The other terms are calculated by adding the previous four terms.at n=15A100532
• a(n) = 8*Sum_{k=0..n} 7^k.at n=4A146885
• Number of open knight's tour diagrams of a 3 X n chessboard that are symmetric under 180-degree rotation and have "type X": both endpoints occur in the same column.at n=21A169773
• Number of permutations of 1..n with all differences of elements separated by distances 1 through 7 being respectively unique.at n=20A170813
• Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,0,1,1,1 for x=0,1,2,3,4.at n=12A197244
• Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and 2w+x+y>1.at n=18A211618
• Number of partitions p of n such that ceiling(mean(p)) is a part and floor(mean(p)) is not.at n=47A241341
• Number of partitions of n such that the number of parts is not a part and the number of distinct parts is a part.at n=43A241378
• Number of magic labelings with magic sum n of 6th graph shown in link.at n=6A244874
• a(0) = 16, after which, if (2*a(n-1)) - 1 = product_{k >= 1} (p_k)^(c_k) then a(n) = product_{k >= 1} (p_{k-1})^(c_k), where p_k indicates the k-th prime, A000040(k).at n=25A246345
• Numbers k such that 5*10^k - 43 is prime.at n=25A281513
• Expansion of 1/(1 - x/(1 - x^8/(1 - x^27/(1 - x^64/(1 - x^125/(1 - x^216/(1 - ... - x^(n^3)/(1 - ...)))))))), a continued fraction.at n=53A291146