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 A256489 First differences of A257509: a(n) = A257509(n+1) - A257509(n). 3
 8, 8, 3, 13, 3, 7, 11, 11, 3, 7, 11, 4, 12, 8, 3, 16, 3, 7, 11, 4, 12, 8, 3, 8, 13, 8, 3, 13, 3, 7, 9, 16, 3, 7, 11, 4, 12, 8, 3, 8, 13, 8, 3, 13, 3, 7, 9, 7, 14, 8, 3, 13, 3, 7, 9, 13, 3, 7, 9, 6, 10, 7, 5, 20, 3, 7, 11, 4, 12, 8, 3, 8, 13, 8, 3, 13, 3, 7, 9, 7, 14, 8, 3, 13, 3, 7, 9, 13, 3, 7, 9, 6, 10, 7, 5, 10, 15, 8, 3, 13, 3, 7, 9 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS It seems that for all n >= 0, Sum_{k=1 .. 2^n} a(k) = 2^(n+3). LINKS Antti Karttunen, Table of n, a(n) for n = 1..16384 FORMULA a(n) = A257509(n+1) - A257509(n). PROG (Scheme) (define (A256489 n) (- (A257509 (+ n 1)) (A257509 n))) (Haskell) a256489 n = a256489_list !! (n-1) a256489_list = zipWith (-) (tail a257509_list) a257509_list -- Reinhard Zumkeller, May 06 2015 CROSSREFS Cf. A257509, A256490. Sequence in context: A073447 A011213 A178728 * A129404 A222075 A117040 Adjacent sequences: A256486 A256487 A256488 * A256490 A256491 A256492 KEYWORD nonn,hear AUTHOR Antti Karttunen, May 03 2015 STATUS approved

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Last modified February 6 18:02 EST 2023. Contains 360111 sequences. (Running on oeis4.)