20911

Appears in sequences

• Numbers whose base-12 representation has exactly 5 runs.at n=17A043654
• Third row of Pascal-(1,4,1) array A081579.at n=41A081587
• Members of A000124 which are multiples of 11.at n=37A083511
• Numbers n such that 8*10^n + 9 is prime.at n=23A103070
• Pyramid game person numbers that have integer solutions.at n=25A135051
• The maximum integer dimension in which the volume of the hypersphere of radius n remains larger than 1.at n=34A177677
• G.f.: A(x) = x/Series_Reversion(G(x)) where x*A(G(x)) = G(x) is the g.f. of A000699.at n=6A178685
• Row square-sums of triangle A210658.at n=5A182018
• Number of 3's in the last section of the set of partitions of n.at n=44A182713
• Number of second differences of arrays of length 5 of numbers in 0..n.at n=9A228220
• Number of (n+1) X (2+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..2 introduced in row major order.at n=5A231257
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..2 introduced in row major order.at n=26A231263
• Number of (6+1)X(n+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..2 introduced in row major order.at n=1A231268