1990656

Appears in sequences

• Orders of finite Abelian groups having the incrementally largest numbers of nonisomorphic forms (A046054).at n=27A046055
• a(n) = 2^(n-3)*(n + 3)*(2*n - 3).at n=12A059224
• Products of exactly 18 primes (generalization of semiprimes).at n=13A069279
• Three people (P1, P2, P3) are in a circle and are saying Hello to each other. They start with P2 saying "Hello, Hello". Thereafter Pn says "Hello" for n times the total number of Hello's so far.at n=13A076507
• Expansion of 3*(1+2*x+6 x^2)/(1-24*x^3).at n=13A076510
• Numbers of divisors associated with the entries of A120585.at n=25A120586
• a(n) = if n mod 2 = 1 then (n^2-1)*n^3/4 else n^5/4.at n=24A122657
• Bases and exponents in the prime decomposition of n replaced by digits of the Gregorian calendar with these indices.at n=35A144227
• a(n) = 12*a(n-2) for n > 2; a(1) = 1, a(2) = 8.at n=11A162466
• Number of spanning trees in G X P_n, where G = {{1, 2}, {1, 3}, {1, 4}, {1, 5}, {2, 3}, {4, 5}}.at n=2A167064
• Number of length n+5 0..2 arrays with no six consecutive terms having two times the sum of any two elements equal to the sum of the remaining four.at n=12A249227
• a(0) = 3; a(n+1) is the smallest number not in the sequence such that a(n+1) - Sum_{i=0..n} a(i) divides a(n+1) + Sum_{i=0..n} a(i).at n=39A250306
• Number of n X 1 arrays of permutations of 0..n*1-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 5.at n=18A264656
• Numbers k such that k^2 is the sum of two positive 5th powers.at n=19A291850
• Fixed points of A256739, Xor-Moebius transform of natural numbers.at n=48A297107
• Numbers k such that phi^e(k) > phi^e(m) for all m < k, where phi^e(k) = A072911(k) is the number of divisors d of k such that d and k are exponentially coprime.at n=11A307004
• Composites c where an integer b with 1 < b < c exists such that when the k digits in the base-b expansion of c are considered as exponents in an ordered list of primes prime(1), prime(2), ..., prime(k), then Product_{i=1..k} prime(i)^d[i] = c, where d[h] gives the h-th most significant digit in the expansion.at n=36A307458
• 3-smooth numbers k such that k+1 and (k+2)/2 are prime.at n=10A325255
• Exponentially-odd coreful highly composite numbers: numbers with record values of the number of exponentially odd coreful divisors (A325837).at n=14A325839
• Numbers at which the sum of the iterated exponential totient function (A331273) attains a record.at n=11A331407