38376

Appears in sequences

• Three-fold exponential convolution of primes with themselves (divided by 2).at n=6A014348
• a(n) = 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, s(0) = 0, s(2n) = n. Also a(n) = T(2n,n), where T is the array in A026300.at n=7A026302
• a(n) = T(n,[ n/2 ]), where T is the array in A026300.at n=14A026307
• Numbers k such that k divides the (right) concatenation of all numbers <= k written in base 19 (most significant digit on right).at n=27A061948
• Values of n such that N=(an+1)(bn+1)(cn+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,35.at n=14A064254
• a(n) = floor(9^n/7^n).at n=42A094991
• 15-gonal (or pentadecagonal) pyramidal numbers: a(n) = n*(n+1)*(13*n-10)/6.at n=26A177890
• a(n) = Sum_{k=1..n} binomial(n,k)*sigma(k).at n=11A185003
• Number of 5 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 1 1 vertically.at n=7A208503
• Number of (w,x,y,z) with all terms in {1,...,n} and w^2>=x*y*z.at n=23A212064
• G.f.: Sum_{n>=0} x^n/(1-x)^(6*n) * Sum_{k=0..n} C(n,k)^2 * x^k.at n=7A249794
• Number of (n+2)X(3+2) 0..1 arrays with no 3x3 subblock diagonal sum 3 and no antidiagonal sum 3 and no row sum 0 and no column sum 0.at n=6A256743
• Number of (n+2)X(7+2) 0..1 arrays with no 3x3 subblock diagonal sum 3 and no antidiagonal sum 3 and no row sum 0 and no column sum 0.at n=2A256747
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum 3 and no antidiagonal sum 3 and no row sum 0 and no column sum 0.at n=38A256748
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 609", based on the 5-celled von Neumann neighborhood.at n=15A283286
• Numbers n such that n * (x-1)/x produces a rotation of the digits in n for some value of x.at n=27A288626
• Irregular triangle read by rows: T(n,m) = number of lattice paths of type {A^Q}_R terminating at point (n, m).at n=56A291082
• Number of ways to select 4 numbers from the set of the first n natural numbers avoiding 3-term arithmetic progressions.at n=30A300760
• Irregular triangular array, read by rows: row n shows the coefficients of the polynomial p(n,x) defined in Comments.at n=13A329433
• Lapidary numbers.at n=34A332755