20056

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 37 ones.at n=2A031805
• Number of (n+2)X3 0..2 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.at n=5A186560
• Number of (n+2) X 8 0..2 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.at n=0A186565
• T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.at n=15A186568
• T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.at n=20A186568
• Number of 4-step self-avoiding walks on an n X n square summed over all starting positions.at n=24A188149
• The maximum possible value for the apex of a triangle of numbers whose base consists of a permutation of the numbers 1 to n, and each number in a higher row is the sum of the two numbers directly below it.at n=11A189162
• Numbers k such that (k+1)*2^k - 1 is prime.at n=26A230769
• Table read by rows: n-th row lists all positive integers k such that exactly half the integers in 1, 2, ..., k are pandigital in base n.at n=3A260900
• Numbers n such that Bernoulli number B_{n} has denominator 1410.at n=24A272369
• G.f. satisfies: A(x) = 1 + 2*x*AGM(A(x)^2, A(-x)^2).at n=17A272822