0,2

1 4 5 8 9 12 13 16 17 20...(A042948)

2 3 6 7 10 11 14 15 18 19...(A042964)

Table of n, a(n) for n=0..71.

For n > 1, a(n+8) = a(n)+8. - David Wasserman, Feb 23 2006

Sequence in context: A199855 A127914 A218035 * A219159 A213928 A065189

Adjacent sequences: A090961 A090962 A090963 * A090965 A090966 A090967

nonn

Giovanni Teofilatto, Feb 29 2004

More terms from David Wasserman, Feb 23 2006

approved