2125764

Appears in sequences

• a(n) = max{(n - i)*a(i) : i < n}; a(0) = 1.at n=40A000792
• Expansion of (1+x)/(1-3*x).at n=13A003946
• a(1)=1, a(2)=2, a(n) = 4*3^(n-3) for n >= 3.at n=14A025579
• Numbers of form 6^i*9^j, with i, j >= 0.at n=34A025628
• a(n) = Sum_{k=0..m} (k+1) * A026120(n, m-k), where m=0 for n=0,1; m=n for n >= 2.at n=13A027327
• a(n) = (n-1)*3^(n-2), n > 0.at n=12A027471
• Triangle of coefficients of certain polynomials (exponents in decreasing order).at n=38A033842
• Triangle whose (i,j)-th entry is binomial(i,j)*6^(i-j)*9^j.at n=26A038263
• Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*6^j.at n=22A038296
• Triangle of coefficients of certain polynomials (exponents in increasing order), equivalent to A033842.at n=42A049323
• Number of compositions of n into 2*j-1 kinds of j's for all j>=1.at n=14A052156
• Least common multiple (LCM) of the first n+1 terms of A000792.at n=37A062723
• Least common multiple (LCM) of the first n+1 terms of A000792.at n=36A062723
• Least common multiple (LCM) of the first n+1 terms of A000792.at n=38A062723
• Number of n-step walks (each step +-1 starting from 0) which are never more than 2 or less than -2.at n=26A068911
• a(2n+1) = 3^n, a(2n) = 4*3^(n-1) except for a(0) = 1.at n=26A074324
• a(1) = 4; a(n) = if n == 2 mod 3 then a(n-1)/2, if n == 0 mod 3 then a(n-1)*2, if n == 1 mod 3 then a(n-1)*3.at n=36A085689
• a(1) = 4; a(n) = if n == 2 mod 3 then a(n-1)/2, if n == 0 mod 3 then a(n-1)*2, if n == 1 mod 3 then a(n-1)*3.at n=38A085689
• Maximum of even products of partitions of n.at n=39A091915
• a(n) = (7*3^n - (-3)^n)/6.at n=13A133125