Talkin 5 as the starting point

1/2(1)=0.5*10=5
1/2(2)=1*10=10
1/2(3)=1.5*10=15......
1/2(12)=6*10=60

now because 6 is 1 away from 5

1/2(1)=0.5*10=5 now 5+1(1)=6
1/2(2)=1*10=10.....10+2(1)=12
1/2(3)=1.5*10=15.. 15+3(1)=18..............
1/2(12)=6*10=60.....60+12(1)=72

and now because 7 is 2 away from 5 the same applies
1/2(1)=0.5*10=5 5+1(2)=7
1/2(2)=1*10=10 10+2(2)=14
1/2(3)=1.5*10=15 15+3(2)=21...........
1/2(12)=6*10=60 60+12(2)=84

let
1/2(1)=0.5*10=5 =P
1/2(2)=1*10=10 =Q
1/2(3)=1.5*10=15=R
1/2(12)=6*10=60=S

SO ALSO UP TO 12 SINCE IT IS 7 FROM 5
P+1(7)=12
Q+2(7)=24
R+3(7)=36.....
S+12(7)=144 OR SINCE 12 IS WITHIN THE 2ND DOMAIN OF 5 I.E 1ST DOMAIN BEING 5-10 AND THE SECOND BEING 10-15 YOU CAN SEE THAT S+12(7)=144 IS ALSO = 2S+24=144

now preceedind 5 we have

for 4