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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. 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; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Inspired by A127330.

LINKS

Ivan Neretin, Table of n, a(n) for n = 1..5151

EXAMPLE

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

MATHEMATICA

Table[2^n + k, {n, 0, 10}, {k, 0, n}] // Flatten (* Ivan Neretin, Aug 30 2015 *)

PROG

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

CROSSREFS

Cf. A127330, A129142.

Sequence in context: A050026 A328413 A174788 * A039225 A052083 A192188

Adjacent sequences:  A129140 A129141 A129142 * A129144 A129145 A129146

KEYWORD

nonn,easy

AUTHOR

Klaus Brockhaus, Mar 31 2007

STATUS

approved

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Last modified April 7 10:46 EDT 2020. Contains 333301 sequences. (Running on oeis4.)