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A274290 Arising in solving the keyboard problem. 0
1, 8, 15, 21, 27, 34, 40, 46 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

See Rowell (2015) for precise definition.

LINKS

Table of n, a(n) for n=0..7.

Jonathan T. Rowell, Solution Sequences for the Keyboard Problem and its Generalizations, Journal of Integer Sequences, Vol. 18 (2015), Article 15.10.7. See Table 2.

CROSSREFS

Sequence in context: A122754 A082867 A075713 * A328410 A089025 A088977

Adjacent sequences:  A274287 A274288 A274289 * A274291 A274292 A274293

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jun 17 2016

STATUS

approved

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Last modified December 10 20:38 EST 2019. Contains 329909 sequences. (Running on oeis4.)