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A128118 At the n-th iteration the sequence of integers from n down to 1 are appended to the sequence a(n) times. 1
1, 2, 1, 2, 1, 3, 2, 1, 4, 3, 2, 1, 4, 3, 2, 1, 5, 4, 3, 2, 1, 6, 5, 4, 3, 2, 1, 6, 5, 4, 3, 2, 1, 6, 5, 4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 8, 7, 6, 5, 4, 3, 2, 1, 9, 8, 7, 6, 5, 4, 3, 2, 1, 9, 8, 7, 6, 5, 4, 3, 2, 1, 9, 8, 7, 6, 5, 4, 3, 2, 1, 9, 8, 7, 6, 5, 4, 3, 2, 1, 10, 9, 8, 7, 6, 5, 4, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Reed Kelly, Feb 15 2007, Table of n, a(n) for n = 1..555

EXAMPLE

a(4) = 2 so 4,3,2,1,4,3,2,1 is added to the end of the sequence at the fourth iteration.

MATHEMATICA

crr[n_] := Module[ { A = {1, 2, 1, 2, 1}, i, j }, For [ i = 3, i <= n, i++, A = Join[ A, Flatten[ Table[ Range[i, 1, -1], {A[[i]]} ]]]; ]; A ]

CROSSREFS

Cf. A128117, A001462, A002260.

Sequence in context: A087467 A231568 A227687 * A205696 A029635 A203301

Adjacent sequences:  A128115 A128116 A128117 * A128119 A128120 A128121

KEYWORD

easy,nonn

AUTHOR

Reed Kelly, Feb 15 2007

STATUS

approved

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Last modified February 17 18:28 EST 2018. Contains 299296 sequences. (Running on oeis4.)