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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
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
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.)