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Search: id:A062561
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| 0, 3, 12, 45, 168, 630, 2376, 9009, 34320, 131274, 503880, 1939938, 7488432, 28973100, 112326480, 436268025, 1697168160, 6611884290, 25792489800, 100734001830, 393847225200, 1541374822260, 6037849200240, 23671113341850
(list; graph; listen)
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OFFSET
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0,2
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LINKS
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Harry J. Smith, Table of n, a(n) for n=0,...,200
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PROGRAM
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(PARI) for(n=0, 22, print(3*binomial(2*n, n-1)))
(PARI) { for (n=0, 200, write("b062561.txt", n, " ", 3*binomial(2*n, n - 1)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 08 2009]
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CROSSREFS
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Cf. A001791.
Sequence in context: A005656 A064017 A005320 this_sequence A128593 A085481 A030195
Adjacent sequences: A062558 A062559 A062560 this_sequence A062562 A062563 A062564
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KEYWORD
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easy,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Jul 13 2001
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