This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A081614 #61 May 31 2021 05:30:03
%S A081614 1,4,6,9,31,70,105,355,799,1798,2697,9103,20482,30723,69127,155536,
%T A081614 233304,349956,524934,787401,2657479,5979328,8968992,13453488,
%U A081614 20180232,30270348,45405522,68108283,153243637,1745540806,2618311209,8836800331,19882800745,67104452515,150985018159,339716290858,509574436287,1146542481646,1719813722469,13059835455001,44076944660629,753095921662471,1694465823740560
%N A081614 Subsequence of A005428 with state = 1.
%C A081614 Values of n such that A054995(n) = 1. - _Ryan Brooks_, Jul 17 2020
%C A081614 From _Petros Hadjicostas_, Jul 20 2020: (Start)
%C A081614 From a(1) = 4 to a(28) = 153243637, the values appear in Table 18 (p. 374) in Schuh (1968) under the Survivor No. 1 column (in a variation of Josephus's counting off game where m people on a circle are labeled 1 through m and every third person drops out).
%C A081614 a(29) here is 1745540806 but 1595540806 in Schuh (1968). Burde (1987) agrees with Schuh (1968). See the table on p. 207 of the paper (with q = 0). Actually, 1595540806 is the last number on the table with q = 0.
%C A081614 It seems Schuh (1968) made a calculation error and Burde (1987) copied it. See my comment for A073941 for more details. (End)
%D A081614 Fred Schuh, The Master Book of Mathematical Recreations, Dover, New York, 1968. [See Table 18, p. 374.]
%H A081614 David A. Corneth, <a href="/A081614/b081614.txt">Table of n, a(n) for n = 0..2816</a>
%H A081614 K. Burde, <a href="http://dx.doi.org/10.1016/0022-314X(87)90078-3">Das Problem der Abzählreime und Zahlentwicklungen mit gebrochenen Basen [The problem of counting rhymes and number expansions with fractional bases]</a>, J. Number Theory 26(2) (1987), 192-209. [The author deals with the representation of n in fractional bases k/(k-1) and its relation to counting-off games. Here k = 3. See the table on p. 207. See also the review in MathSciNet (MR0889384) by R. G. Stoneham.]
%H A081614 <a href="/index/J#Josephus">Index entries for sequences related to the Josephus Problem</a>
%F A081614 a(n) = [(n+1)-th even number of A061419]/2. - _John-Vincent Saddic_, May 29 2021
%o A081614 (PARI) /* In the program below, we use a truncated version of either A005428 or A073941 and choose those terms that correspond to "state" or "number of last survivor" equal to 1. See A073941 or Schuh (1968) for more details. */
%o A081614 first(n) = {my(res = vector(n), t = 1, wn = wo = 4, go = gn = 1); res[1] = 1; for(i = 1, oo, c = wo % 2; if(go == 1, t++; res[t] = wo; if(t >= n, return(res) ) ); wn = floor(wo*3/2) + c * (2 - go); gn = 3 * c + go * (-1)^c; wo = wn; go = gn; ) } \\ _David A. Corneth_ and _Petros Hadjicostas_, Jul 20 2020
%Y A081614 Cf. A005428, A073941, A081615, A061419.
%K A081614 nonn,easy
%O A081614 0,2
%A A081614 _N. J. A. Sloane_, Apr 23 2003
%E A081614 More terms from _Hans Havermann_, Apr 23 2003