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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. 5
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 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: A059036 A184442 A163466 * A179969 A085203 A251104

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 December 6 08:53 EST 2016. Contains 278775 sequences.