21544

Appears in sequences

• Powers of cube root of 10 rounded down.at n=13A018003
• Powers of cube root of 10 rounded to nearest integer.at n=13A018004
• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 73.at n=33A031571
• Numbers k such that 2*3^k + 5 is prime.at n=28A057911
• Largest number whose cube has n digits.at n=12A061439
• Square array of Pell related numbers, read by antidiagonals.at n=61A086350
• a(n) = a(n-1) + a(n-2) + 3*a(n-3), with a(0) = 1, a(1) = 0, a(2) = 1.at n=16A103143
• Expansion of (1-3*x)/(1-8*x+14*x^2).at n=6A161731
• Total number of parts that are neither the smallest part nor the largest part in all partitions of n.at n=30A182977
• Number of (n+2)X(1+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 4.at n=1A252392
• Number of (n+2)X(2+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 4.at n=0A252393
• T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 4.at n=1A252397
• T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 4.at n=2A252397
• Those terms of A255571 whose every A080541/A080542-rotation is also a term of A255571.at n=40A258001
• Number of (n+1)X(2+1) 0..1 arrays with each row and column prime, read as a binary number with top and left being the most significant bits.at n=9A261755
• Triangle read by rows: T(n,k) = number of cubic graphs with 2n nodes and packing chromatic number k (n>=2, 4 <= k <= n+2).at n=29A275622
• Number of odd parts in the partitions of n into 7 parts.at n=46A309622
• Number of integer partitions of n whose product of parts is >= n.at n=37A319005
• Number of compositions of n into parts with distinct multiplicities and with exactly eight parts.at n=31A321778
• Number of minimum sized maximal subsets of {1..n} such that every pair of distinct elements has a different difference.at n=50A382396