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Search: id:A071243
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A071243 Record terms in A005179. +0
1
1, 2, 4, 6, 16, 64, 1024, 4096, 65536, 262144, 4194304, 268435456, 1073741824, 68719476736, 1099511627776, 4398046511104, 70368744177664, 4503599627370496, 288230376151711744, 1152921504606846976 (list; graph; listen)
OFFSET

1,2

COMMENT

The only term which is not a power of 2 is the 4-th term 6.

Essentially the same as A061286 with terms {1,6} added.

FORMULA

For n>2, a(n+2) = A061286(n) = 2^(A000040(n)-1) = 2^A006093(n).

CROSSREFS

Cf. A005179.

Sequence in context: A032503 A050838 A155978 this_sequence A112086 A070325 A076660

Adjacent sequences: A071240 A071241 A071242 this_sequence A071244 A071245 A071246

KEYWORD

nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 20 2002

EXTENSIONS

Edited, corrected and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jun 28 2008

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.


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