15135120

Appears in sequences

• a(n) is the smallest number which has n consecutive divisors k, k+1, ..., k+n-1 such that the quotients all begin with the same digit.at n=7A053014
• Least common multiple of all cycle sizes in range [A014137(n-1)..A014138(n-1)] of permutation A057505/A057506.at n=10A060114
• Determinant of an n X n matrix whose diagonal are the first n nonprime numbers and all other elements are 1's.at n=8A067546
• a(n) = (2*n+2)!/((n+2)*n!).at n=6A092956
• Triangle of unsigned 4-Lah numbers.at n=29A143499
• Triangle read by rows, T(n,k) = C(2*n,n+k)*Sum_{m=0..k} (-1)^(m+k)*C(n+k,n+m)* Stirling1(n+m,m), for n>=0 and 0<=k<=n.at n=29A268440
• Alphabetic length of a divide-and-conquer approach to the regular expression for permutations of n symbols.at n=13A320460
• Partition triangle read by rows. Number of ordered set partitions of the set {1, 2, ..., 2*n} with all block sizes divisible by 2.at n=39A327022
• The smallest number k for which exactly n of its divisors are digitally balanced numbers in base 3 (A049354).at n=28A372146
• Positive integers whose maximum frequency in a fixed row of A036038 (or A078760) is equal to 3, i.e., numbers m such that A376663(m) = 3.at n=10A376670