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A061983
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3^n - (3n^2 + n + 2)/2.
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2
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0, 0, 1, 11, 54, 202, 671, 2109, 6460, 19556, 58893, 176959, 531218, 1594062, 4782667, 14348561, 43046328, 129139720, 387419993, 1162260915, 3486783790, 10460352530, 31381058871, 94143178021, 282429535604, 847288608492
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,4
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LINKS
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PROG
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(PARI) { for (n=0, 200, write("b061983.txt", n, " ", 3^n - (3*n^2 + n + 2)/2) ) } \\ Harry J. Smith, Jul 29 2009
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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