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 A257800 Sequence A233271 reduced modulo 2: a(n) = A000035(A233271(n)); the parity of each term in the infinite trunk of inverted binary beanstalk. 9
 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0 LINKS Antti Karttunen, Table of n, a(n) for n = 0..8727 FORMULA a(n) = A000035(A233271(n)). a(0) = 0; a(1) = 1; and for n > 1, a(n) = 1 - A213729(A218602(n)). PROG (Scheme, two variants) (define (A257800 n) (A000035 (A233271 n))) (define (A257800 n) (if (< n 2) (A000035 n) (- 1 (A213729 (A218602 n))))) CROSSREFS Cf. A000035, A213729, A218602, A233271. Cf. A257803 (positions of ones), A257804 (positions of zeros), A257807 (partial sums). Cf. also A257799. Sequence in context: A215531 A305386 A174998 * A284772 A051069 A051065 Adjacent sequences:  A257797 A257798 A257799 * A257801 A257802 A257803 KEYWORD nonn AUTHOR Antti Karttunen, May 12 2015 STATUS approved

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Last modified December 6 18:03 EST 2019. Contains 329809 sequences. (Running on oeis4.)