29524

Appears in sequences

• a(n) = (3^n - 1)/2.at n=10A003462
• Gaussian binomial coefficients [ n,9 ] for q = 3.at n=1A022200
• Sum of odd divisors of n < sqrt(n) = sum of even divisors of n < sqrt(n).at n=9A033832
• Number of sublattices of index n in generic 10-dimensional lattice.at n=2A038997
• Numbers n such that number of runs in the base 3 representation of n is congruent to 1 mod 10.at n=18A043816
• Erroneous version of A003462.at n=8A045886
• Numbers that are repdigits in base 3.at n=19A048328
• Numbers that are repdigits in base 9.at n=36A048334
• a(n) = a(n-1) + 3*a(n-2) - 3*a(n-3), with a(0)=a(1)=1, a(2)=4.at n=19A052993
• a(n) = a(n-1) + 3*a(n-2) - 3*a(n-3), with a(0)=a(1)=1, a(2)=4.at n=18A052993
• Number of primitive (aperiodic) word structures of length n using a 3-ary alphabet.at n=10A056274
• Total number of parts in all partitions of n into odd parts.at n=46A067588
• Z(S_m; sigma[1](n), sigma[2](n),..., sigma[m](n)) where Z(S_m; x_1,x_2,...,x_m) is the cycle index of the symmetric group S_m and sigma[k](n) is the sum of k-th powers of divisors of n; m=9.at n=2A068026
• a(n) = (-1)^n * (3^n - 1)/2.at n=10A076040
• Numbers of the form (3^{mr}-1)/(3^r-1) for positive integers m, r.at n=23A076270
• Maximal cycle lengths in a certain class of one-dimensional cellular automata.at n=22A085591
• Maximal term in Collatz-iteration started at 3^n-1.at n=8A087971
• Number of ways associated with A088959.at n=29A088111
• Expansion of (1+3x)/((1-x^2)(1-3x^2)).at n=18A094025
• Triangle read by rows: T(n,k) = (n+1,k)-th element of (M^3-M)/2, where M is the infinite lower Pascal's triangle matrix, 1<=k<=n.at n=45A096034