350064

Appears in sequences

• 6th power of rooted tree enumerator; number of linear forests of 6 rooted trees.at n=10A000395
• a(1)=1, a(n) = LCM of the integers, from 1 to n/2, which are coprime to n.at n=34A124443
• Denominator of the Harary number for the cycle graph C_n.at n=34A160047
• Sum of the numerators for computing the fourth moment of the probability mass function for the number of involutions with k 2-cycles in n elements (A000085) assuming equal likelihood.at n=8A174782
• 2*A002740(n).at n=10A217213
• a(n) is the least number k for which A000005(k)/A222084(k) = n.at n=9A222086
• Denominators of the sum of the reciprocals of the Collatz (3x+1) sequence beginning at n.at n=8A225784
• Number of 4Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.at n=10A241258
• Triangle where g.f. C = C(x,m) and related series S = S(x,m) and D = D(x,m) satisfy S = x*C*D, C = 1 + x*S*D, and D = 1 + m*x*S*C, as read by rows of coefficients T(n,k) of x^(2*n)*m^k in C(x,m) for n>=0, k=0..n.at n=69A278881
• Triangle where g.f. D = D(x,m) and related series S = S(x,m) and C = C(x,m) satisfy S = x*C*D, C = 1 + x*S*D, and D = 1 + m*x*S*C, as read by rows of coefficients T(n,k) of x^(2*n)*m^k in C(x,m) for n>=1, k=0..n.at n=74A278882