A005698 - OEIS

A005698

Positions of remoteness 2 in Beans-Don't-Talk.
(Formerly M4394)

7, 29, 57, 227, 455, 1821, 3641, 14563, 29127, 116509, 233017, 932067, 1864135, 7456541, 14913081, 59652323, 119304647, 477218589, 954437177, 3817748707, 7635497415, 30541989661, 61083979321, 244335917283, 488671834567, 1954687338269

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..26.

R. K. Guy, John Isbell's game of beanstalk and John Conway's game of beans-don't-talk, Math. Mag. 59 (1986), no. 5, 259-269.

FORMULA

Numbers of the form (2^(3*n+3)+(-1)^n)/9 or (2^(3*n+5)-5*(-1)^n)/9 for n >= 1 [From Guy]. - Sean A. Irvine, Aug 11 2016

CROSSREFS

Sequence in context: A165492 A084201 A031380 * A080185 A355920 A219835

Adjacent sequences: A005695 A005696 A005697 * A005699 A005700 A005701

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

EXTENSIONS

More terms from Sean A. Irvine, Aug 11 2016

STATUS

approved