G.f. A(x) satisfies: A(x) = 1 + x + x^2 + x^3 + x^4 + x^5 + x^6 * A(x/(1 - 2*x)) / (1 - 2*x).

A351345

G.f. A(x) satisfies: A(x) = 1 + x + x^2 + x^3 + x^4 + x^5 + x^6 * A(x/(1 - 2*x)) / (1 - 2*x).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =3a(8) =9a(9) =27a(10) =81a(11) =243a(12) =729a(13) =2189a(14) =6601a(15) =20141a(16) =63009a(17) =205989a(18) =718905a(19) =2720543a(20) =11183601a(21) =49321367a(22) =228895201a(23) =1097860903a(24) =5371546897a(25) =26598018425a(26) =132755261681a(27) =667027581401

External references