19337

Appears in sequences

• Define the sequence S(a(0),a(1)) by a(n+2) is the least integer such that a(n+2)/a(n+1) > a(n+1)/a(n) for n >= 0. This is S(6,30).at n=5A022023
• McKay-Thompson series of class 38a for Monster.at n=48A058658
• Integers n > 1997 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 1997.at n=36A063055
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (0, 1, -1), (0, 1, 0), (0, 1, 1), (1, 0, 1)}.at n=7A151138
• Numbers n with property that n^2 is a concatenation of three 3-digit primes.at n=31A153139
• Expansion of f(-x)^6 / (chi(x) * phi(-x)^6) in powers of x where phi(), chi(), f() are Ramanujan theta functions.at n=6A226034
• Semiprimes whose prime factors differ from each other in one bit position only.at n=51A261077
• First column of A261987.at n=12A262042
• MM-numbers of capturing, non-nesting multiset partitions (with empty parts allowed).at n=37A326260
• Number of 6-regular bipartitions of n.at n=20A328548
• a(n) is the number of vertices formed by n-secting the angles of an octagon.at n=41A335770
• Sum of the prime numbers appearing along the border of an n X n square array whose elements are the numbers from 1..n^2, listed in increasing order by rows.at n=43A344846
• Numbers m such that Stern polynomial B(m,x) has no irreducible polynomial factors that themselves are Stern polynomials. The initial a(1) = 1 is included by convention.at n=24A389918