22650

Appears in sequences

• Sorted Galois numbers.at n=40A028689
• Product of a prime and the previous number.at n=35A036689
• Numbers representable in exactly two ways as (p-1)*p^e (where p is a prime and e >= 0) in ascending order.at n=17A114874
• a(n) = (p+2)!/p! where p is the n-th lesser twin prime, A001359(n).at n=11A126251
• Numbers m such that m^k does not divide the denominator of the m-th generalized harmonic number H(m,k) nor the denominator of the m-th alternating generalized harmonic number H'(m,k), for k = 4.at n=41A128674
• Sequence generated from Lim:_{n..inf.} M^n, M = an infinite lower triangular matrix with (1,3,3,3,...) in every column, shifted down twice.at n=42A171370
• a(n) = (7*n + 3)*(7*n + 4).at n=21A177071
• Sum of the heights of the base pyramids in all dispersed Dyck paths of length n (i.e., in all Motzkin paths of length n with no (1,0)-steps at positive heights). A base pyramid is a factor of the form U^j D^j (j>0), starting at the horizontal axis. Here U=(1,1) and D=(1,-1).at n=15A191396
• Least m > 0 such that gcd(m^(2n+1)+2, (m+1)^(2n+1)+2) > 1.at n=10A255832
• Least k > 0 such that gcd(k^n+2, (k+1)^n+2) > 1, or 0 if there is no such k.at n=23A255852
• Numbers m such that gcd(A001008(m), m) > 1, in increasing order.at n=36A256102
• a(n) = (4*n+3)*(4*n+2).at n=37A256833
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 190", based on the 5-celled von Neumann neighborhood.at n=38A270683
• Number of ways to place 9 points on an n X n board so that no more than 2 points are on a vertical or horizontal straight line.at n=4A279443
• Triangle read by rows: T(n, k) is the number of ways to place k points on an n X n square grid so that no more than 2 points are on a vertical or horizontal straight line.at n=32A279445
• Oblong numbers that are the sum of 2 successive primes.at n=32A298077
• Totients congruent to 2 mod 4 and that have multiplicity 4.at n=10A334839
• a(n) = (prime(n)+1) * prime(n+1).at n=34A345727
• Semiperimeter of the unique primitive Pythagorean triple whose inradius is the n-th odd prime and whose short leg is an even number.at n=33A380301