102102

Appears in sequences

• a(n) = T(n, n-4), T given by A026519. Also a(n) = number of integer strings s(0), ..., s(n), counted by T, such that s(n) = 4.at n=12A026524
• a(n) = T(n,n-4), T given by A026536. Also a(n) = number of integer strings s(0), ..., s(n), counted by T, such that s(n) = 4.at n=12A026541
• Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,0,2.at n=5A037503
• a(n) = Sum_{i=0..floor(n/2)} T(i,n-i), array T as in A047072.at n=20A047074
• Products of exactly 6 distinct primes.at n=21A067885
• a(n) is the smallest positive integer m for which A070194(m) (i.e., the maximal gap in {k|gcd(k,m) = 1, 1 <= k <= m-1}) is n.at n=15A070971
• a(n) = n*(n+1)*(n^2+1)/2.at n=21A071237
• Integers which have more than one coprime factorization into nonprime powers which sum to the same number.at n=7A072940
• Numbers with six distinct prime divisors.at n=26A074969
• Triangle read by rows: T(n,k) = A002110(n)/prime(n+1-k), k = 1..n.at n=25A077011
• a(n) = Sum_{k=1..(p-1)*(p-2)} floor((k*p)^(1/3)) where p is the n-th prime.at n=15A078838
• Ninth column (m=8) of (1,4)-Pascal triangle A095666.at n=10A095671
• Triangle T(n,k) read by rows: T(n,0) = A002110(n) and T(n,k) = A002110(n)/prime(k) for 1<=k<=n.at n=31A121281
• Least k such that the Jacobsthal function A048669(k) = n.at n=15A128759
• Denominator of Sum_{k=1..n} k^2*H_{n+k} where H_m = Sum_{i=1..m} 1/i.at n=9A144653
• Records in A152235.at n=46A152452
• Digitally balanced numbers: ternary numbers which have the same number of 0's as 1's as 2's.at n=12A181986
• Array of divisor product arguments appearing in the denominator of the unique representation of primorials A002110 in terms of divisor products.at n=65A185973
• Numbers k such that 3^k + 10 is prime.at n=33A217137
• Denominator of Sum_{i=1..n} 1/(prime(i)*prime(i+1)).at n=5A241190