18105

Appears in sequences

• Number of partitions of n if there are two kinds of 1's and two kinds of 2's.at n=24A000097
• Number of bipartite partitions of n white objects and 3 black ones.at n=19A000412
• Row sums of the triangle described in A082200.at n=23A082203
• Numbers k such that 6*k+1, 6*k+7, 6*k+13, 6*k+19 are consecutive primes.at n=20A090839
• Assume the conjectured terms of A105594 are the correct beginnings of the trajectories described in A003508. a(n) is a record length of b(n) iterations to arrive at the collected trajectories. This sequence cites the a(n)'s.at n=17A105600
• Row sums of triangle A118032, where the matrix square of A118032 forms a diagonal bisection of A118032.at n=14A118036
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+967)^2 = y^2.at n=5A130017
• a(1) = 1, and for each k >=2, a(k) is the smallest number n such that n/sin(n) > a(k)/sin(a(k)), so that a(1)/sin(a(1)) > a(2)/sin(a(2)) > ... > a(k)/sin(a(k)) > ...at n=39A172445
• a(n) = n*(n+1)*(22*n-19)/6.at n=17A256716
• Products of three distinct tribonacci numbers > 1.at n=40A274434
• Lexicographically earliest increasing sequence a, b, c, ... such that every partial product (1-x^a), (1-x^a)(1-x^b), (1-x^a)(1-x^b)(1-x^c), ... has coefficients -1, 0, 1 only.at n=22A274768
• Duplicate of A090839.at n=20A296055