20364

Appears in sequences

• Number of integer-sided hexagons having perimeter n.at n=34A124286
• Number of binary strings of length n with equal numbers of 00000 and 00011 substrings.at n=15A164180
• Number of 1..12 integer arrays v[1..n] of length n with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..n-1.at n=3A171286
• Number of 1..n integer arrays v[1..4] of length 4 with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..3.at n=11A171341
• Numbers n such that 10^n - 63 is prime.at n=17A178433
• The number of symmetric positive definite 2 X 2 matrices whose entries are integers of absolute value at most n.at n=27A219693
• Cogrowth function of the group Baumslag-Solitar(3,3).at n=5A229645
• Triangle read by rows: T(n,k) = t(n-k, k); t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), where f(x) = 3*x + 2.at n=22A257610
• Triangle read by rows: T(n,k) = t(n-k, k); t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), where f(x) = 3*x + 2.at n=26A257610
• Numbers k such that 7*R_k + 10^k - 6 is prime, where R_k = 11...11 is the repunit (A002275) of length k.at n=7A259121
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 718", based on the 5-celled von Neumann neighborhood.at n=39A273427
• Numbers k such that 4 is the smallest decimal digit of k^3.at n=32A291643
• Triangle read by rows: T(n,k) is the number of graphs with loops on n unlabeled vertices with k loops.at n=31A361404
• Triangle read by rows: T(n,k) is the number of graphs with loops on n unlabeled vertices with k loops.at n=32A361404