72418

Appears in sequences

• Shifts 2 places left under Dirichlet convolution.at n=34A144366
• Number of (n+1) X 3 binary arrays with rows and columns in nondecreasing order and with no 2 X 2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.at n=38A184064
• Number of n X n 0..5 matrices with each 2X2 subblock idempotent.at n=12A224662
• G.f. satisfies A(x) = A(x^2) + A(x^2)^2*A(x^3)/A(x^6), with A(0) = 0 and A'(0) = 1.at n=48A382316