7174454

Appears in sequences

• a(n) = (3^n + 1)/2.at n=15A007051
• Degree of variety K_{2,n}^4.at n=3A013701
• Number of periodic palindromic structures of length n using a maximum of three different symbols.at n=31A056504
• Square array read by antidiagonals: degree of the K(2,p)^q variety.at n=32A082635
• Number of set partitions with at most 3 blocks; number of Dyck paths of height at most 4; dimension of space of symmetric polynomials in 3 noncommuting variables.at n=16A124302
• a(n) = 3*a(n-1) - a(n-3) + 3*a(n-4), with initial values 1,4,14,41.at n=14A132357
• a(0)=1; a(3n+1) = a(3n)+1, a(3n+2) = a(3n+1) + a(3n) (=3*A000244), a(3n+3) = a(3n+2) + a(3n) (=A003462(n+2)).at n=43A140298
• a(n)=4a(n-1)-7a(n-2)+6a(n-3)-3a(n-4), n>4.at n=31A140343
• a(n)=4a(n-1)-7a(n-2)+6a(n-3)-3a(n-4), n>4.at n=32A140343
• a(0) = 1 and a(n) = (3^n - (-1)^n)/2 for n >= 1.at n=15A152011
• a(n) = (3*9^n + 1)/2.at n=7A199560
• Permutation of natural numbers, the even bisection of A241909 incremented by one and halved; equally, a composition of A241909 and A048673: a(n) = A048673(A241909(n)).at n=46A243066
• Permutation of natural numbers: a(n) = A048673(A122111(n)).at n=46A243506
• a(1) = 1, then A007051 ((3^n)+1)/2 interleaved with A057198 (5*3^(n-1)+1)/2.at n=29A246360
• Number of partitions of n^5 into at most two parts.at n=27A274325
• a(n) = (-1)^(n+1) * (3^n+1)/2.at n=15A341463