18164

Appears in sequences

• Convolution of natural numbers with Beatty sequence for the golden mean A000201.at n=39A023541
• Numbers n such that Catalan(n)-1 is prime.at n=36A053427
• Largest eigenvalue, rounded to the nearest integer, of a rank n matrix of 1..n^2 filled successively along rows.at n=32A072333
• In base 4, n sets a new record for the number of Reverse and Add! steps needed to reach a palindrome starting with n.at n=11A075686
• In base 4, smallest number that requires n Reverse and Add! steps to reach a palindrome.at n=38A077441
• Number of permutations of length n which avoid the patterns 2341, 4213.at n=8A116709
• Determinants of 3 X 3 matrices of discrete blocks of 9 consecutive primes.at n=32A117329
• Number of binary strings of length n with equal numbers of 00001 and 01100 substrings.at n=15A164201
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 65", based on the 5-celled von Neumann neighborhood.at n=30A270085
• Square array A(n,k), n>=0, k>=0, read by antidiagonals, where column k is the expansion of Product_{j>=1} (1 - j^k*x^j)^j.at n=62A294580
• Growth series for group with presentation < S, T : S^2 = T^3 = (S*T)^10 = 1 >.at n=28A298812
• Number T(n,k) of permutations of [n] with exactly k distinct lengths of increasing runs; triangle T(n,k), n>=0, 0<=k<=A003056(n), read by rows.at n=24A317327
• a(n) = Sum_{i=1..n} sigma(i)*sigma(i+1), where sigma(n) = A000203(n) is the sum of the divisors of n.at n=26A330322
• Number of quadrilateral regions in a "frame" of size n X n (see Comments in A331776 for definition), divided by 8.at n=24A332596