265720

Appears in sequences

• a(n) = (3^n - 1)/2.at n=12A003462
• Degree of variety K_{2,n}^3.at n=3A013700
• Gaussian binomial coefficients [ n,11 ] for q = 3.at n=1A022202
• Sublattices of index n in generic 12-dimensional lattice.at n=2A038999
• Erroneous version of A003462.at n=10A045886
• Numbers that are repdigits in base 3.at n=23A048328
• Numbers that are repdigits in base 9.at n=44A048334
• a(n) = a(n-1) + 3*a(n-2) - 3*a(n-3), with a(0)=a(1)=1, a(2)=4.at n=22A052993
• a(n) = a(n-1) + 3*a(n-2) - 3*a(n-3), with a(0)=a(1)=1, a(2)=4.at n=23A052993
• Number of primitive (aperiodic) word structures of length n using a 3-ary alphabet.at n=12A056274
• a(n) = (-1)^n * (3^n - 1)/2.at n=12A076040
• Numbers of the form (3^{mr}-1)/(3^r-1) for positive integers m, r.at n=29A076270
• Square array read by antidiagonals: degree of the K(2,p)^q variety.at n=24A082635
• Maximal cycle lengths in a certain class of one-dimensional cellular automata.at n=32A085589
• Maximal cycle lengths in a certain class of one-dimensional cellular automata.at n=32A085590
• Number of ways associated with A088959.at n=39A088111
• Expansion of (1+3x)/((1-x^2)(1-3x^2)).at n=22A094025
• a(n) = Sum_{j=0..11} n^j.at n=3A105067
• An inverse Catalan transform of A003462.at n=24A106233
• a(1)=1; then successively add 1, divide by 2, add 2 and then total up the last 4 terms.at n=46A112027