155648

Appears in sequences

• 14-almost primes (generalization of semiprimes).at n=20A069275
• Number of permutations of {1,2,...,n} that result in a binary search tree (when elements of the permutation are inserted in that order) of height n-1 (i.e., the second largest possible height).at n=13A076616
• a(n) = n*2^(n-6).at n=13A078836
• a(n) = 19*2^n.at n=13A110288
• Second differences of A129952.at n=15A129954
• Row sums of triangle A133935.at n=15A131352
• Number of connected components in the double Bruhat cells for simple Lie groups of type B_n (or C_n).at n=12A131769
• Hankel transform of A186035.at n=13A186036
• a(n)=least k such that A284821(n) = A284761(k).at n=21A284822
• Numbers k such that uphi(k) does not divide uphi(k!).at n=10A291548
• Number of solutions to x^n == 1 (mod n!).at n=37A318576
• Heinz numbers of integer partitions whose length is 2/3 their sum.at n=30A348384
• Number of minimum dominating sets in the 2 X n king graph.at n=30A350816
• a(n) is the number of exterior top arches (no covering arch) for semi-meanders in generation n+1 that are generated by semi-meanders with n top arches and floor((n+2)/2) exterior top arches using the exterior arch splitting algorithm.at n=23A365679