A083279 Length of odd/even runs in A061419, where a(2n)=length of n-th run of even numbers in A061419 and a(2n-1)=length of n-th run of odd numbers.

1, 1, 2, 3, 2, 1, 1, 2, 2, 1, 1, 1, 1, 2, 2, 1, 1, 2, 1, 1, 1, 5, 2, 1, 1, 7, 1, 1, 5, 2, 2, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 2, 4, 1, 2, 1, 6, 1, 1, 5, 2, 1, 2, 1, 1, 1, 2, 2, 1, 2, 4, 3, 2, 3, 3, 1, 4, 1, 1, 2, 1, 1, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 8, 1, 1, 1, 1, 5

Offset: 1

Author

Ralf Stephan, Jun 02 2003

Keywords

• nonn
• easy

Comments

Parity of A061419(n) can be fully reconstructed from this sequence.

Programs

PARI

p=1; c=0; r=0; for(n=1, 1000, p=p+ceil(p/2);  if(p%2==r, c=c+1, print1(c", "); r=!r; c=1))