9663676416

Appears in sequences

• a(n) = 9*4^n.at n=15A002063
• Expansion of g.f.: (1+x)/(1-8*x).at n=11A003951
• a(n) = 9*2^n.at n=30A005010
• a(n) = 2^n*n^2.at n=24A007758
• Number of compositions of n into 3*j-1 kinds of j's for all j >= 1.at n=17A055841
• Smallest integer with A002191(n) divisors, i.e., the number of divisors equals the sum of the divisors of a different number.at n=38A061072
• Numbers n such that reciprocal of n terminates with an infinite repetition of digit 1. Multiples of 10 are omitted.at n=7A064560
• Number of divisors of n-th cyclic number.at n=16A087024
• Row 8 of array in A288580.at n=32A092973
• a(n) = smallest positive number that occurs exactly n times as a difference between two positive squares.at n=42A094191
• Smallest number having exactly s divisors, where s is the n-th semiprime (A001358).at n=31A096932
• a(n) = n*(n-1)*8^n.at n=9A128802
• a(n) = (n^3 + n^2)*8^n.at n=7A129008
• Numbers n such that sigma(sigma(n))-phi(phi(n)) = 3n.at n=8A137600
• Numbers k such that k is a member of A002183 but 2*k is not.at n=13A160233
• Number of reduced words of length n in Coxeter group on 9 generators S_i with relations (S_i)^2 = (S_i S_j)^12 = I.at n=11A166541
• Number of reduced words of length n in Coxeter group on 9 generators S_i with relations (S_i)^2 = (S_i S_j)^13 = I.at n=11A166924
• Number of reduced words of length n in Coxeter group on 9 generators S_i with relations (S_i)^2 = (S_i S_j)^14 = I.at n=11A167110
• Number of reduced words of length n in Coxeter group on 9 generators S_i with relations (S_i)^2 = (S_i S_j)^15 = I.at n=11A167658
• Number of reduced words of length n in Coxeter group on 9 generators S_i with relations (S_i)^2 = (S_i S_j)^16 = I.at n=11A167900