A268673 - OEIS

A268673

a(0) = 0; a(1) = 1; for n > 1, a(n) = 1 + 4*A092246(n-1).

0, 1, 5, 29, 45, 53, 77, 85, 101, 125, 141, 149, 165, 189, 197, 221, 237, 245, 269, 277, 293, 317, 325, 349, 365, 373, 389, 413, 429, 437, 461, 469, 485, 509, 525, 533, 549, 573, 581, 605, 621, 629, 645, 669, 685, 693, 717, 725, 741, 765, 773, 797, 813, 821, 845, 853, 869, 893, 909, 917, 933, 957, 965, 989, 1005

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

COMMENTS

Seems to be also the fixed points of permutations A268823 and A268824.

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..10000

FORMULA

a(0) = 0; a(1) = 1; for n > 1, a(n) = 1 + 4*A092246(n-1).

MATHEMATICA

Join[{0, 1}, 1 + 4 Select[Range[1, 251, 2], OddQ[Total[IntegerDigits[#, 2]]]&]] (* Jean-François Alcover, Mar 15 2016 *)

PROG