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Search: id:A126883
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| A126883 |
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(2^0)*(2^1)*(2^2)*(2^3)...(2^n)-1 = 2^T_n-1 (cf. A000217). |
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+0
2
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| 0, 1, 7, 63, 1023, 32767, 2097151, 268435455, 68719476735, 35184372088831, 36028797018963967, 7378697629483820643, 302231454903657293676543, 2475880078570760549798248447
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OFFSET
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0,3
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COMMENT
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For n>2 every consecutive pair share at least one factor.
a(n)= A006125(n+1)-1. - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 12 2007
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MAPLE
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seq(2^(binomial(2+n, n))-1, n=-1..12); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 12 2007
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CROSSREFS
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Sequence in context: A051579 A049464 A084063 this_sequence A137810 A036287 A116231
Adjacent sequences: A126880 A126881 A126882 this_sequence A126884 A126885 A126886
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KEYWORD
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nonn
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AUTHOR
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Marco Matosic (marcomatosic(AT)hotmail.com), Dec 29 2006
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