A175910 Take the left or right binary concatenation of the numbers 1 to n, whichever is greater, delete digits identical to corresponding digits in the other concatenation, condense the remaining digits, and convert to decimal.

0, 2, 2, 2, 44, 42, 178, 812, 52, 11682, 44585, 52778, 3222, 727657, 15264354, 928184, 60925872, 15976986770, 4166367305, 785545793868, 11730991244, 11804109800746, 41522369301, 3574301245885612, 198659132140236

Offset: 1

Author

Dylan Hamilton, Oct 14 2010

Keywords

• base
• easy
• nonn

Crossrefs

Cf. A047778, A098780

Programs

Mathematica

Module[{l,r,d,ldump,larger,rdump},l = {}; r = {}; Table[d = IntegerDigits[x, 2]; l = Flatten[{l, d}]; r = Flatten[{d, r}]; If[x > 1, ldump = l; rdump = r; While[First[ldump] == First[rdump], ldump = Rest[ldump]; rdump = Rest[rdump]]; If[First[ldump] == 1, larger = ldump, larger = rdump]; FromDigits[Pick[larger, OddQ[ldump + rdump]], 2], 0], {x, 1, DESIRED_NUMBER_OF_TERMS}]]