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Search: id:A061981
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| 0, 0, 4, 20, 72, 232, 716, 2172, 6544, 19664, 59028, 177124, 531416, 1594296, 4782940, 14348876, 43046688, 129140128, 387420452, 1162261428, 3486784360, 10460353160, 31381059564, 94143178780, 282429536432, 847288609392
(list; graph; listen)
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OFFSET
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0,3
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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, 200, write("b061981.txt", n, " ", 3^n - 2*n - 1) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 29 2009]
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CROSSREFS
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Column of A061980.
Sequence in context: A055538 A123613 A006740 this_sequence A054611 A121257 A145563
Adjacent sequences: A061978 A061979 A061980 this_sequence A061982 A061983 A061984
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KEYWORD
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nonn
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AUTHOR
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Henry Bottomley (se16(AT)btinternet.com), May 24 2001
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