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 A085207 Array A(x,y): concatenation of binary expansions of x & y, listed antidiagonalwise as A(0,0), A(1,0), A(0,1), A(2,0), A(1,1), A(0,2), ... Zero is expanded as an empty string. 17
 0, 1, 1, 2, 3, 2, 3, 5, 6, 3, 4, 7, 10, 7, 4, 5, 9, 14, 11, 12, 5, 6, 11, 18, 15, 20, 13, 6, 7, 13, 22, 19, 28, 21, 14, 7, 8, 15, 26, 23, 36, 29, 22, 15, 8, 9, 17, 30, 27, 44, 37, 30, 23, 24, 9, 10, 19, 34, 31, 52, 45, 38, 31, 40, 25, 10, 11, 21, 38, 35, 60, 53, 46, 39, 56, 41, 26, 11 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS Table of n, a(n) for n=0..77. EXAMPLE A(2,1) = 5 = '101' in binary, concatenation of 2's binary expansion '10' and 1's '1'. A(1,2) = 6 = '110' in binary, concatenation of '1' and '10'. PROG (MIT/GNU Scheme) (define (A085207bi x y) (+ (* (expt 2 (A029837 (1+ y))) x) y)) (define (A085207 n) (A085207bi (A025581 n) (A002262 n))) (define (A085208 n) (A085207bi (A002262 n) (A025581 n))) CROSSREFS Same array in binary: A085209. Transpose: A085208. Variant: A085211. Can be used to compute A085201. Sequence in context: A295609 A163466 A306733 * A179969 A356861 A327717 Adjacent sequences: A085204 A085205 A085206 * A085208 A085209 A085210 KEYWORD nonn,tabl AUTHOR Antti Karttunen, Jun 23 2003 STATUS approved

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Last modified June 25 05:27 EDT 2024. Contains 373697 sequences. (Running on oeis4.)