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 A331003 a(n) is the imaginary part of f(n) (as defined in A330779). 2
 0, 1, 1, -1, -1, 2, 2, -2, -2, 2, 2, -2, -2, 3, 3, -3, -3, 2, 2, -4, -4, 3, 3, -3, -3, 4, 4, -3, -3, 4, 4, -4, -4, 4, 4, -5, -5, 3, 3, -5, -5, 5, 5, -6, -6, 3, 3, -6, -6, 4, 4, -5, -5, 5, 5, -6, -6, 6, 6, -7, -7, 3, 3, -7, -7, 5, 5, -6, -6, 5, 5, -6, -6, 5, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,6 LINKS Rémy Sigrist, Table of n, a(n) for n = 0..10000 Rémy Sigrist, PARI program for A331003 FORMULA a(2*k+2) = a(2*k+1) for any k >= 0. a(2*k+1) = a(2*k) + A330779(2*k+1) * (-1)^k for any k >= 0. PROG (PARI) See Links section. CROSSREFS Cf. A330779. Sequence in context: A209253 A165113 A069903 * A086007 A108582 A071840 Adjacent sequences:  A331000 A331001 A331002 * A331004 A331005 A331006 KEYWORD sign AUTHOR Rémy Sigrist, Jan 05 2020 STATUS approved

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Last modified May 31 00:29 EDT 2020. Contains 334747 sequences. (Running on oeis4.)