19616

Appears in sequences

• Minimal elements of pairs of "Super Unitary Amicable Numbers", sorted by their minimal elements.at n=41A045613
• McKay-Thompson series of class 32A for Monster.at n=40A058629
• Numbers k such that 2*R_k + 7 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=13A099410
• Row sums of correlation triangle for (1+x)^3/(1-x).at n=36A115293
• Floor(n*exp(sec(n))).at n=29A134899
• 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, -1), (-1, -1, 0), (0, 0, -1), (0, 1, 1), (1, 0, 1)}.at n=8A150183
• a(n) is the smallest number k > 0 such that k, k + 1, ... , k + n - 1 are nonprime numbers, but k + n is prime.at n=45A230358
• Number of states with reflective symmetry arising in matrix method for enumerating Hamiltonian cycles on 2n X 2n grid.at n=9A238117
• Numbers k where A098550(k)/k reaches a record high.at n=17A250127
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 461", based on the 5-celled von Neumann neighborhood.at n=30A272293
• a(n) is the smallest number k such that the difference between the next prime greater than k and k equals n.at n=44A309877
• Triples (a,b,c) such that (a+b+c)^3 = concat(a,b,c), a, b, c > 0, ordered by size of this value.at n=35A328199
• a(1) = 1; for n > 1, a(n) = sigma((2^n)-1) - sigma((2^(n-1))-1), where sigma is A000203, the sum of divisors.at n=16A329890