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A080522
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Leading diagonal of triangle in A080521.
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1
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1, 3, 5, 10, 22, 49, 107, 228, 476, 979, 1993, 4030, 8114, 16293, 32663, 65416, 130936, 261991, 524117, 1048386, 2096942, 4194073, 8388355, 16776940, 33554132, 67108539, 134217377, 268435078, 536870506, 1073741389, 2147483183
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| a(n)=2^n-(n-1)*(n-2)/2-n+1 for n>1 - Lambert Herrgesell (zero815(AT)googlemail.com), Mar 14 2006
a(n)=A014844(n), n>1. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 19 2008]
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CROSSREFS
| Cf. A080521.
Sequence in context: A053709 A102772 A018005 * A173232 A132332 A171867
Adjacent sequences: A080519 A080520 A080521 * A080523 A080524 A080525
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KEYWORD
| nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 21 2003
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EXTENSIONS
| More terms from Lambert Herrgesell (zero815(AT)googlemail.com), Mar 14 2006
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