174240

Appears in sequences

• Theta series of 8-d 5-modular lattice Q_8(1) with det 625 and minimal norm 4.at n=25A028976
• Fourth column (m=3) of triangle A090447.at n=9A090448
• Number of reduced words of length n in Coxeter group on 12 generators S_i with relations (S_i)^2 = (S_i S_j)^4 = I.at n=5A163055
• Number of genus 2, degree n, simply ramified covers of an elliptic curve.at n=25A170991
• Numbers k such that (2^k + 5) / 3 is prime.at n=21A273009
• Numbers n such that phi(n) * tau(n) divides n^2, but neither tau(n) nor phi(n) divides n.at n=16A287800
• Triangle read by rows: T(n,k) is the number of strict multiset partitions of normal multisets of size n into k blocks, where a multiset is normal if it spans an initial interval of positive integers.at n=40A330787
• a(n) is the smallest number m with exactly n divisors whose first digit equals the first digit of m.at n=34A357300
• The second Jordan totient function applied to the powerful numbers: a(n) = A007434(A001694(n)).at n=35A379716
• The second Jordan totient function applied to the squares.at n=21A379833