49196

Appears in sequences

• Numbers k such that usigma(k) = phi(k)*omega(k), where omega(k) is the number of distinct prime divisors of k.at n=22A063795
• Convolution of Fibonacci F(n+1), n>=0, with F(n+4), n>=0.at n=15A067332
• a(n) = Sum_{k=0..n} (k^k-k!).at n=5A068983
• Largest achievable determinant of a 3 X 3 matrix whose elements are 9 distinct nonnegative integers chosen from the range 0..n.at n=24A097401
• Expansion of eta(q^4) * eta(q^28) / (eta(q) * eta(q^7)) in powers of q.at n=46A123648
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 1), (0, 0, -1), (0, 1, -1), (1, 0, 1)}.at n=9A149374
• Number of subsets of {1,2,...,n-10} without differences equal to 2, 4, 6, 8 or 10.at n=49A224812
• Numbers k such that A372692(k) = A372692(k+1) > 1.at n=8A372693
• Number of integer compositions of n whose leaders of strictly increasing runs are weakly increasing.at n=19A374690
• Expansion of e.g.f. (1/x) * Series_Reversion( x * (1 - x*log(1-x)^2) ).at n=7A392760