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Search: id:A014143
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A014143 Partial sums of A014138. +0
2
1, 4, 12, 34, 98, 294, 919, 2974, 9891, 33604, 116103, 406614, 1440025, 5147876, 18550572, 67310938, 245716094, 901759950, 3325066996, 12312494462, 45766188948, 170702447074, 638698318850, 2396598337950 (list; graph; listen)
OFFSET

0,2

FORMULA

G.f.: [1-2*z-sqrt(1-4z)]/[2z^2(1-z)^2] - Emeric Deutsch (deutsch(AT)duke.poly.edu), Jan 27 2003

CROSSREFS

Sequence in context: A079818 A115390 A005056 this_sequence A077994 A077843 A061703

Adjacent sequences: A014140 A014141 A014142 this_sequence A014144 A014145 A014146

KEYWORD

nonn

AUTHOR

njas

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Last modified September 7 12:28 EDT 2008. Contains 143483 sequences.


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