21951

Appears in sequences

• Nearest integer to Gamma(n + 3/11)/Gamma(3/11).at n=9A020012
• a(n) = floor(Gamma(n+3/11)/Gamma(3/11)).at n=9A020057
• a(n) = n^3 - 1.at n=27A068601
• Reflected (see A074058) pentanacci numbers A074048.at n=49A074062
• Numbers k such that k!! + 2^4 is prime.at n=23A076189
• Sum of antidiagonals of square table that satisfies T(n+1,k+1) = sum(i=0,n, sum(j=0,k, T(n-i,k-j)*T(i,j) )) such that the top row and diagonal are equal: T(0,k)=T(k,k)=A088159(k).at n=6A088160
• a(n) = n^3 + (-1)^(n+1).at n=28A123363
• Positive X-values of solutions to the equation 1!*X^4 - 2!*(X + 1)^3 + 3!*(X + 2)^2 - (4^2)*(X + 3) + 5^2 = Y^3.at n=27A135300
• a(n) = 784*n - 1.at n=27A158399
• a(n) = 28*n^2 - 1.at n=27A158554
• Order of Fibonacci group F(n,3) (or 0 if the group is infinite).at n=27A202625
• Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y>2z.at n=19A212504
• Values for b in abc-triples with a=1.at n=36A216323
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 398", based on the 5-celled von Neumann neighborhood.at n=43A271695
• Numbers n such that n * (x-1)/x produces a rotation of the digits in n for some value of x.at n=22A288626
• a(n) is the least k > n such that n divides k, and n+1 divides k+1, and n+2 divides k+2.at n=26A295388
• Bases in which 7 is a unique-period prime.at n=43A306075
• a(n) is the number of partitions p = p(1) >= p(2) >= ... >= p(k) of n whose alternating sum is a part of p.at n=42A308410
• Triangle T(n,k) read by rows: T(n,k) = number of ways of seating n people around a table for the second time so that k pairs are maintained. Reflected sequences are counted as one.at n=49A326397
• Numbers k such that the odd part of (1+k) divides (1 + odd part of sigma(k)).at n=20A336700