476161

Appears in sequences

• Number of n X n binary matrices of order dividing 7 (i.e., number of solutions of X^7=I in GL(n,2)).at n=4A053772
• G.f.: Sum_{n>=0} Product_{k=1..n} ((1+2*x)^k - 1)/((1+2*x)^k + 1).at n=10A208816