a:b:c=> nr consecutive
a=152
b=a+1...=> b=153
c=a+2...=> c=154
a+b+c=?
152+153+154=495
b=152....=> a=b-1...=> a=151....=>c=b+1...=>c=153
151+152+153=456
c=152...=>a=c-2...=>a=150...=>b=c-1...=>b=151
150+151+152=453
-----------------------------------------------------------------
a=225...=>b=226...=>c=227
225+226+227=678
b=225...=> a=224...=>c=226
224+225+226=675
c=225...=>a=223...=>b=224
223+224+225=672
---------------------------------------------------------
a=255...=>b=256...=>c=257
255+256+257=768
b=255..=>a=254...=>c=256
254+255+256=765
c=255...=> a=253...=>b=254
253+255+254=762
