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A275720
a(1) = 0; for n > 1, if A003961(n) > A003961(n-1) then a(n) = a(n-1) + 1, otherwise if A003961(n) < A003961(n-1), then a(n) = a(n-1) - 1.
4
0, 1, 2, 3, 2, 3, 2, 3, 2, 1, 0, 1, 0, 1, 2, 3, 2, 3, 2, 3, 2, 1, 0, 1, 0, 1, 2, 1, 0, 1, 0, 1, 0, -1, 0, 1, 0, 1, 2, 3, 2, 3, 2, 3, 4, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 1, 0, 1, 0, 1, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 4, 3, 2, 3, 2, 3, 4, 3, 2, 3, 2, 3, 4, 5, 4, 5, 4, 5, 4, 3, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 4, 3, 4, 5
OFFSET
1,3
LINKS
FORMULA
a(1) = 0; for n > 1, if A003961(n) > A003961(n-1) then a(n) = a(n-1) + 1, otherwise if A003961(n) < A003961(n-1), then a(n) = a(n-1) - 1.
PROG
(Scheme, with memoization-macro definec)
(definec (A275720 n) (if (= 1 n) 0 (+ (A275720 (- n 1)) (if (> (A003961 n) (A003961 (- n 1))) 1 -1))))
CROSSREFS
KEYWORD
sign
AUTHOR
Antti Karttunen, Aug 07 2016
STATUS
approved