A289394 a(n) = A288968(n)/4.

6, 87, 1606, 32325, 694662, 15528631, 357084294, 8381837481, 199870549318, 4825613579415, 117685008900294, 2893968761750149, 71662670867210118, 1785128827454666007, 44695890712594405318, 1124087528135149982673, 28381310631267855206406

Offset: 1

Author

Seiichi Manyama, Jul 05 2017

Keywords

• nonn

Links

• Seiichi Manyama, Table of n, a(n) for n = 1..702

Crossrefs

Cf. A006352 (E_2), A288968, A289392 (E_2^(1/4)).

Cf. A289395, A289396.

Formula

a(n) = 1/2 + (1/(48*n)) * Sum_{d|n} A008683(n/d) * A288877(d).