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 A262681 Odd bisection of A262680. 4
 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,85 COMMENTS Number of perfect squares (A000290) encountered before zero is reached when starting from k = 2n+1 and repeatedly applying the map that replaces k by k - d(k), where d(k) is the number of divisors of k (A000005). This count includes n itself if it is a square, but excludes the zero. LINKS Antti Karttunen, Table of n, a(n) for n = 0..10082 FORMULA a(n) = A262680((2*n)+1). PROG (Scheme) (define (A262681 n) (A262680 (+ n n 1))) CROSSREFS Cf. A000005, A000290, A010052, A049820, A155043, A262677, A262680, A262682. Sequence in context: A322506 A103496 A267863 * A076498 A110268 A058965 Adjacent sequences:  A262678 A262679 A262680 * A262682 A262683 A262684 KEYWORD nonn AUTHOR Antti Karttunen, Oct 03 2015 STATUS approved

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Last modified June 14 19:28 EDT 2021. Contains 345038 sequences. (Running on oeis4.)