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Search: id:A129143
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A129143 Start with the empty sequence and append in step k the consecutive numbers 2^(k-1) to 2^(k-1)+k-1. +0
3
1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 16, 17, 18, 19, 20, 32, 33, 34, 35, 36, 37, 64, 65, 66, 67, 68, 69, 70, 128, 129, 130, 131, 132, 133, 134, 135, 256, 257, 258, 259, 260, 261, 262, 263, 264, 512, 513, 514, 515, 516, 517, 518, 519, 520, 521, 1024, 1025, 1026, 1027, 1028 (list; graph; listen)
OFFSET

1,2

COMMENT

Inspired by A127330.

EXAMPLE

In step 5 the numbers 2^4 to 2^4+4 are appended: 16, 17, 18, 19, 20.

PROGRAM

(MAGMA) &cat[ [2^k..2^k+k]: k in [0..11] ];

CROSSREFS

Cf. A127330, A129142.

Sequence in context: A153134 A045546 A050026 this_sequence A039225 A052083 A039268

Adjacent sequences: A129140 A129141 A129142 this_sequence A129144 A129145 A129146

KEYWORD

nonn,easy

AUTHOR

Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Mar 31 2007

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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