43923

Appears in sequences

• Numbers of the form 3^i*11^j.at n=29A003597
• a(n) = floor(10000*log_2(n)).at n=20A004268
• a(n) = round(10000*log_2(n)).at n=20A004269
• Number of directed animals of size n (k=1 column of A038622); number of (s(0), s(1), ..., s(n)) such that s(i) is a nonnegative integer and |s(i) - s(i-1)| <= 1 for i = 1,2,...,n, where s(0) = 2; also sum of row n+1 of array T in A026323.at n=11A005774
• Expansion of 1/((1-x)(1-4x)(1-5x)(1-11x)).at n=4A021784
• Numbers k such that k^2 contains only digits {1,2,9}.at n=6A053888
• Floor of the area of consecutive Prime-Indexed Prime triangles.at n=14A119659
• Numbers k such that k and k^2 use only the digits 1, 2, 3, 4 and 9.at n=18A136972
• Odd numbers k such that A166100((k-1)/2)/k is not an integer.at n=32A166102
• G.f.: A(x) = ( Sum_{n>=0} x^n/sf(n) )^3 where A(x) = Sum_{n>=0} a(n)*x^n/sf(n), and sf(n) = Product_{k=0..n} k! is the superfactorial of n (A000178).at n=5A193521
• Number of 2 X 2 matrices with all elements in {0,1,...,n} and positive odd determinant.at n=21A210373
• Number of 2 X 2 matrices having all terms in {1,...,n} and positive odd determinant.at n=21A211068
• Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y>=2z.at n=22A212505
• a(n) = 3*n^4.at n=11A219056
• 3*h^2, where h is an odd integer not divisible by 3.at n=40A229852
• Number of partitions of 9^n into parts that are at most n with at least one part of each size.at n=3A239168
• Number of permutations of n elements divided by the number of 10-ary heaps on n+1 elements.at n=52A273738
• a(n) = 3*11^(2*n).at n=2A324269
• Heinz numbers of integer partitions such that the difference between the length of the minimal square containing and the maximal square contained in the Young diagram is 1.at n=45A325179
• sqrt(a(n)) / 4 is the maximum area of any triangle with integer side lengths whose perimeter is n, or a(n) = -1 if there is no such triangle.at n=33A387833