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A371927
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Expansion of 1/(1 - x/(1 - 8*x^2)^(1/4)).
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1
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1, 1, 1, 3, 5, 17, 33, 113, 237, 803, 1769, 5915, 13493, 44547, 104337, 340527, 814397, 2630857, 6399865, 20486905, 50548997, 160507953, 400834465, 1263577141, 3188428301, 9985916077, 25426685961, 79168607025, 203193847381, 629311885861, 1626634117809
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OFFSET
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0,4
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LINKS
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FORMULA
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a(n) = Sum_{k=0..floor(n/2)} 8^k * binomial((n+2*k)/4-1,k).
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MAPLE
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add(8^k*binomial((n+2*k)/4-1, k), k=0..floor(n/2)) ;
end proc:
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PROG
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(PARI) a(n) = sum(k=0, n\2, 8^k*binomial((n+2*k)/4-1, k));
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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