OFFSET

1,1

COMMENTS

a(n) - a(n-1) is in {1,2,3,4,5,6,7} for n >= 1; also, 4n - a(n) is in {0,1,2,3} for n >= 1. The first 20 numbers 4n - a(n) are 2, 3, 0, 1, 3, 0, 1, 2, 0, 1, 2, 3, 1, 2, 3, 0, 3, 0, 1, 2, with

0 in positions given by A287554,

1 in positions given by A287555,

2 in positions given by A287552,

3 in positions given by A287553.

LINKS

Clark Kimberling, Table of n, a(n) for n = 1..10000

MATHEMATICA

CROSSREFS

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, May 31 2017

STATUS

approved