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A284007
a(n) = a(a(n-A002487(n))) + a(n-a(n-A002487(n))) with a(1) = a(2) = 1, where A002487 = Stern-Brocot sequence.
5
1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 7, 7, 7, 8, 8, 9, 10, 11, 11, 11, 12, 12, 14, 13, 14, 14, 15, 16, 15, 16, 16, 18, 18, 18, 19, 19, 20, 20, 22, 22, 24, 23, 25, 24, 25, 25, 25, 26, 26, 27, 27, 28, 29, 28, 30, 29, 30, 31, 30, 32, 34, 34, 33, 33, 34, 34, 36, 37, 36, 37, 38, 38, 40, 41, 39, 40, 43, 42, 44, 43, 43, 44, 44, 45, 45, 45, 50
OFFSET
1,3
LINKS
FORMULA
a(1) = a(2) = 1, for n > 2, a(n) = a(a(A284013(n))) + a(n-a(A284013(n))).
PROG
(Scheme, with memoization-macro definec)
(definec (A284007 n) (if (<= n 2) 1 (+ (A284007 (A284007 (- n (A002487 n)))) (A284007 (- n (A284007 (- n (A002487 n)))))))) ;; Code for A002487 given under that entry.
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Mar 23 2017
STATUS
approved