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A061982
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3^n - (n + 1)(n + 2)/2.
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2
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0, 0, 3, 17, 66, 222, 701, 2151, 6516, 19628, 58983, 177069, 531350, 1594218, 4782849, 14348771, 43046568, 129139992, 387420299, 1162261257, 3486784170, 10460352950, 31381059333, 94143178527, 282429536156, 847288609092
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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LINKS
| Harry J. Smith, Table of n, a(n) for n=0,...,200
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PROG
| (PARI) { for (n=0, 200, write("b061982.txt", n, " ", 3^n - (n + 1)*(n + 2)/2) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 29 2009]
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CROSSREFS
| Column of A061980.
Sequence in context: A130857 A168547 A120386 * A101562 A034566 A069468
Adjacent sequences: A061979 A061980 A061981 * A061983 A061984 A061985
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KEYWORD
| nonn
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AUTHOR
| Henry Bottomley (se16(AT)btinternet.com), May 24 2001
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