Expansion of 1/( 1 - 4 * Sum_{k>=0} x^(3^k) / (1 - x^(3^k)) )^(1/2).

A382368

Expansion of 1/( 1 - 4 * Sum_{k>=0} x^(3^k) / (1 - x^(3^k)) )^(1/2).

Terms

    a(0) =1a(1) =2a(2) =8a(3) =36a(4) =162a(5) =750a(6) =3536a(7) =16858a(8) =81100a(9) =392914a(10) =1914268a(11) =9369190a(12) =46032396a(13) =226898158a(14) =1121510176a(15) =5556731592a(16) =27589816042a(17) =137240945530a(18) =683808343416

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