45612

Appears in sequences

• pi(n) associated with A049529.at n=8A049530
• a(n) is the smallest number not already in the sequence, such that the concatenation of all a(n) displays the periodic digit string 1, 2, 3, 4, 5, 6 (and repeat).at n=27A165304
• G.f. satisfies: A(A(x)) = Sum_{n>=1} a(n)*x^n * (Sum_{k=0..n} C(n,k)^2*x^k), where g.f. A(x) = Sum_{n>=1} a(n)*x^n.at n=6A193205
• Smallest number k such that R(n) is the n-th divisor of k, where R(n) is the n-th Ramanujan prime (A104272).at n=16A233933
• Triangle read by rows: T(n, k) = Sum_{t=k..n-2} (-1)^(t-k)*(n-t)!*binomial(t,k)*binomial(n-2,t).at n=50A264027
• Lexicographically first sequence of distinct terms such that any set of six successive digits can be reordered as {d, d+1, d+2, d+3, d+4, d+5}, d being the smallest of the six digits.at n=61A302501
• Numbers m such that sigma(m)*tau(m) is a square but sigma(m)/tau(m) is not an integer.at n=15A327831