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 A134048 a(n) = [x^n] G(x)^( 2^(n+2) ) / 4^n, where G(x) is the g.f. of A134046 such that G(x) satisfies: [x^n] G(x)^(2^n) = 4^n for n>=0. 0
 1, 4, 28, 548, 35108, 7507972, 5383397764, 13122109416964, 110735166982705668, 3291956693540520243204, 349880644048154072353961988, 134569675810924626719483447943172 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Table of n, a(n) for n=0..11. PROG (PARI) {a(n)=local(A=[]); for(i=0, n, A=concat(A, 0); A[i+1]=(4^i - Vec(Ser(A)^(2^i))[i+1])/2^i); Vec(Ser(A)^(2^(n+2)))[n+1]/4^n} CROSSREFS Cf. A134046, A134047. Sequence in context: A203220 A338816 A111817 * A091969 A101346 A120604 Adjacent sequences: A134045 A134046 A134047 * A134049 A134050 A134051 KEYWORD nonn AUTHOR Paul D. Hanna, Oct 25 2007 STATUS approved

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Last modified September 15 18:02 EDT 2024. Contains 375954 sequences. (Running on oeis4.)