27904

Appears in sequences

• arcsin(tan(sin(x)))=x+2/3!*x^3+16/5!*x^5+440/7!*x^7+27904/9!*x^9...at n=4A012146
• Third column of A059450.at n=11A086866
• Numbers that appear in A076078.at n=25A097210
• a(n) = the number of sets of distinct positive integers with a least common multiple of A025487(n), i.e., A076078(A025487(n)).at n=18A097211
• Numbers n such that A076078(m)=n for some m, excluding powers of 2.at n=10A097416
• Numbers that are the least element of a k-cycle (k > 1) of permutation A113821.at n=23A115641
• a(n) = 109*n^2.at n=16A174339
• Products of the 8th power of a prime and a distinct prime (p^8*q).at n=28A179668
• Number of permutations of n copies of 1..8 introduced in order 1..8 with no element equal to another within a distance of 6.at n=2A190937
• Triangle read by rows: T(n,k) is the number of compositions of n having k distinct parts (n>=1, 1<=k<=floor((sqrt(1+8*n)-1)/2)).at n=53A235998
• Number of compositions of n with exactly 2 transitions between different parts.at n=40A244714
• Number of partitions of 5 copies of n into distinct parts.at n=14A258283
• a(n) is the numerator of the sum of the first n terms of 1 - 1/3 - 1/5 + 1/7 + 1/9 - 1/11 - 1/13 + ... .at n=7A346781
• a(n) = Sum_{k=1..n} (-1)^k*k^3*floor(n/k).at n=35A366917