84630

Appears in sequences

• a(n) = n*(n + 1)*(3*n + 1).at n=30A027903
• Number of multigraphs with loops on 3 nodes with n edges.at n=33A050531
• Products of exactly 6 distinct primes.at n=14A067885
• Numbers with six distinct prime divisors.at n=16A074969
• Row sums of A075652.at n=34A075650
• First occurrence (*2) of n in A088627 - or - least number that yields n different primes if you factorize it in all possible ways in two factors and add these factors.at n=17A091350
• Numbers n such that the denominator of the 2n-th Bernoulli number is divisible by n but sum_{d|n} sigma(d)/phi(d) is not an integer.at n=26A099008
• Records in A152235.at n=45A152452
• Minimum perimeter of n-tuples of Heronian triangles with equal perimeter and equal area.at n=7A198311
• Magic sums of 4 X 4 semimagic squares composed of consecutive primes.at n=35A270864
• Numbers k such that usigma(k) >= 3*k, where usigma(k) = sum of unitary divisors of k (A034448).at n=12A285615
• Triangle read by rows, a refinement of the central Stirling numbers of the first kind A187646, T(n, k) for n >= 0 and 0 <= k <= n.at n=17A293609
• a(n) = (1/4)*(7*n + 17)*(5*n + 6)*Pochhammer(n, 6) / 6!.at n=5A293613
• Numbers k > 2 such that omega(k) > log(log(k)) + 2 * sqrt(log(log(k))), where omega(k) is the number of distinct primes dividing k (A001221).at n=19A336910
• Lexicographically earliest sequence of positive distinct terms such that the digital root of a(n) is the number of distinct prime factors of a(n+1).at n=43A337096
• T(n,k) is the number of posets of n labeled elements with k covering relations (n>=1, k>=0). Triangle read by rows.at n=32A342589
• Coreful highly touchable numbers: numbers m > 0 such that a record number of numbers k have m as the sum of the aliquot coreful divisors (A336563) of k.at n=10A372741
• Products of 6 distinct primes that are sandwiched between twin prime numbers.at n=2A378097
• a(n) is the smallest integer k such that A384237(k) = n.at n=13A385391
• Squarefree 3-abundant numbers: squarefree numbers k such that A000203(k) > 3*k.at n=12A387153