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A328728
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a(n) = Sum_{k = 0..w and t_k > 0} (-1)^t_k * 2^k, where Sum_{k = 0..w} t_k * 3^k is the ternary representation of A328727(n).
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2
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0, -1, 1, -2, 2, -4, -5, -3, 4, 3, 5, -8, -9, -7, -10, -6, 8, 7, 9, 6, 10, -16, -17, -15, -18, -14, -20, -21, -19, -12, -13, -11, 16, 15, 17, 14, 18, 12, 11, 13, 20, 19, 21, -32, -33, -31, -34, -30, -36, -37, -35, -28, -29, -27, -40, -41, -39, -42, -38, -24
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OFFSET
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1,4
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COMMENTS
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Every integer appears once in the sequence.
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LINKS
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Rémy Sigrist, Table of n, a(n) for n = 1..5461
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FORMULA
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a(n) = A328749(A328727(n)).
Sum_{k = 1..n} a(k) = 0 iff n belongs to A001045.
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PROG
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(PARI) for (n=0, 297, t = Vecrev(digits(n, 3)); if (sum(k=1, #t-1, t[k]*t[k+1])==0, print1 (sum(k=1, #t, if (t[k], 2^k*(-1)^t[k], 0)/2) ", ")))
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CROSSREFS
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Cf. A001045, A328727, A328749.
Sequence in context: A210200 A119989 A137605 * A242348 A186053 A133082
Adjacent sequences: A328725 A328726 A328727 * A328729 A328730 A328731
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KEYWORD
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sign,base
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AUTHOR
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Rémy Sigrist, Oct 26 2019
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STATUS
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approved
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