25248

Appears in sequences

• Absolute value of Glaisher's alpha(n).at n=38A002290
• a(n) = a(n-1) + a(n-9) for n >= 9; a(n) = 1 for n=0..7; a(8) = 2.at n=56A005711
• Number of asymmetric (identity) trees with n nodes and 5 leaves.at n=17A055336
• Number of integers not exceeding 2^n that are impossible as sum-of-divisors of other numbers.at n=14A095380
• Number of permutations of floor(i*7/6), i=0..n-1, with all sums of 4 adjacent terms unique.at n=7A152342
• Numbers n such that there exists an x!=n that makes {x,x,n} an amicable multiset.at n=6A259303
• Number of binary vectors of length n having maximal runs-resistance.at n=25A319414
• Position of second appearance of 2n in the sequence of prime gaps A001223; if 2n does not appear at least twice, a(n) = -1.at n=33A356221
• Number of integer partitions of n whose second differences sum to 0, meaning either there is only one part, or the first two parts have the same difference as the last two parts.at n=49A360683
• a(n) = Sum_{k=1..n} (-1)^(k-1) * binomial(floor(n/k)+4,5).at n=17A366723
• a(n) = Sum_{k=0..floor(n/3)} binomial(3*n-8*k,k).at n=19A373640