25688

Appears in sequences

• Number of ordered 5-tuples of integers from [ 1,n ] with no common factors among pairs.at n=37A015663
• Least k such that first k terms of A022303 contain n more 2's than 1's.at n=17A025518
• Binomial transform of [1, 2, 3, 4, 0, 0, 0, ...].at n=34A139488
• Number of binary strings of length n with no substrings equal to 0000, 0001, or 1100.at n=18A164415
• Number of (w,x,y,z) with all terms in {1,...,n} and |x-y|=|y-z|.at n=26A212679
• Numbers k such that Sum_{i=1..k} i^tau(i) == 0 (mod k), where tau(i) = A000005(i), the number of divisors of i.at n=10A229095
• Number of partitions of n with difference 5 between the number of odd parts and the number of even parts, both counted without multiplicity.at n=42A242696
• a(n) = (2*n-3-(-1)^n)*(22*n^2-21*n+5*n*(-1)^n)/96.at n=38A298992