A226781 Number of 1's in A132199 preceding the n-th Rowland prime, A137613(n).

3, 3, 7, 7, 17, 17, 39, 39, 40, 40, 89, 89, 91, 95, 95, 100, 215, 215, 447, 447, 448, 448, 917, 917, 919, 1862, 1862, 3750, 3750, 7528, 7528, 7533, 15097, 15097, 15122, 15122, 15124, 30284, 30284, 60606, 60606, 60607, 60607, 60656, 60656, 121356, 121356

Offset: 1

Author

Vladimir Shevelev, Jun 29 2013

Keywords

• nonn

Comments

The length of the clusters of 1's in A132199 is 3, 0, 4, 0, 10, 0, 22, 0, 1, 0, 49,.. and this sequence here are the partial sums of these lengths.

Crossrefs

Cf. A132199, A137613.

Programs

Maple

cd1 := 0 ;
for i from 1 do
    if A132199(i) = 1 then
        cd1 := cd1+1 ;
    else
        printf("%d,\n",cd1) ;
    end if;
end do: # R. J. Mathar, Jul 04 2013