1417176

Appears in sequences

• a(n) = 8*3^n.at n=11A005051
• Numbers of form 6^i*9^j, with i, j >= 0.at n=32A025628
• a(n) = number of (s(0), s(1), ..., s(n)) such that every s(i) is an integer, s(0) = 0, |s(i) - s(i-1)| = 1 for i = 1,2,3; |s(i) - s(i-1)| <= 1 for i >= 4. Also a(n) = sum of numbers in row n+1 of the array T defined in A026082 and a(n) = 24*3^(n-4) for n >= 4.at n=14A026097
• a(n) = Sum_{k=0..2n} (k+1) * A025177(n, k).at n=11A027261
• Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*9^j.at n=26A038239
• Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*4^j.at n=22A038294
• a(1) = 6; for n > 0, a(n+1) = a(n) * (sum of digits of a(n)).at n=5A047898
• Goedel encoding of the prime factors of n, in increasing order and repeated according to multiplicity.at n=32A074736
• a(n) = 2^A066657(n) * 3^A066658(n).at n=18A076941
• First differences of A003946.at n=13A080923
• a(n) = (8*3^n - 5*0^n)/3.at n=12A083583
• Product of the nonprime divisors of n.at n=53A087652
• Number of meaningful differential operations of the n-th order on the space R^8.at n=22A090993
• Maximum of even products of partitions of n.at n=38A091915
• Coefficient of q^n in (1-q)^3/(1-3q); dimensions of the enveloping algebra of the derived free Lie algebra on 3 letters.at n=14A118264
• (n^2-n)*3^n.at n=9A128797
• Number of zig-zag paths from top to bottom of a rectangle of width 5 with n rows whose color is that of the top right corner.at n=24A153339
• a(n) = 0 if n is 1 or a prime, otherwise a(n) = product of composite (nonprime) divisors of n.at n=53A157721
• Number of permutations of 2 indistinguishable copies of 1..n arranged in a circle with exactly 1 local maximum.at n=10A159715
• Number of (n+1)X2 0..1 arrays with the number of clockwise edge increases in every 2X2 subblock differing from each horizontal or vertical neighbor.at n=21A205187