STATUS
reviewed
approved
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Revision History for A271324
(Bold, blue-underlined text is an addition; faded, red-underlined text is aShowing entries 1-10 | older changes
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proposed
reviewed
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editing
proposed
PROG
(Python)
def A271324(n): return n+(n>>2)+(n&3) # Chai Wah Wu, Jan 29 2023
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approved
editing
PROG
(MAGMAMagma) [n + Floor(n/4) + (n mod 4): n in [0..80]];
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editing
approved
LINKS
Bruno Berselli, <a href="/A271324/b271324.txt">Table of n, a(n) for n = 0..1000</a>
FORMULA
GO.g.f.: x*(2 + 2*x + 2*x^2 - x^3)/((1 - x)^2*(1 + x + x^2 + x^3)).
E.g.f.: ((6 + 5*x)*sinh(x) + (3 + 5*x)*cosh(x) - 3*(sin(x) + cos(x)))/4.
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approved
editing
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proposed
approved
STATUS
editing
proposed