Number of ordered n-tuples of integers from [ 1..n ] with no global factor.

A345131

Number of ordered n-tuples of integers from [ 1..n ] with no global factor.

Terms

    a(0) =1a(1) =2a(2) =8a(3) =29a(4) =118a(5) =427a(6) =1671a(7) =6260a(8) =24034a(9) =91301a(10) =351261a(11) =1345434a(12) =5191170a(13) =20018845a(14) =77500485a(15) =300290041a(16) =1166450850a(17) =4535971707a(18) =17670369300a(19) =68913194733a(20) =269114332057

External references