A043055 a(n)=(s(n)+4)/6, where s(n)=n-th base 6 palindrome that starts with 2.

1, 3, 13, 14, 15, 16, 17, 18, 73, 80, 87, 94, 101, 108, 433, 439, 445, 451, 457, 463, 470, 476, 482, 488, 494, 500, 507, 513, 519, 525, 531, 537, 544, 550, 556, 562, 568, 574, 581, 587, 593, 599, 605, 611, 618, 624, 630, 636, 642

Offset

1,2

Links

Harvey P. Dale, Table of n, a(n) for n = 1..2000

Mathematica

b6pQ[n_]:=Module[{idn6=IntegerDigits[n, 6]}, idn6==Reverse[idn6]&&idn6[[1]] == 2]; (#+4)/6&/@Select[Range[10000], b6pQ] (* Harvey P. Dale, Jun 16 2019 *)

Crossrefs

Sequence in context: A198452 A286190 A224693 * A101235 A230508 A045233

Adjacent sequences: A043052 A043053 A043054 * A043056 A043057 A043058

Keyword

nonn,base

Author

Clark Kimberling

Status

approved