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A112060 Square array A(x,y) = y-th natural number k for which A112049(k)=x and 0 if no such k exists; read by antidiagonals A(1,1), A(2,1), A(1,2), A(3,1), A(2,2), ... 16
1, 2, 3, 5, 4, 11, 6, 7, 12, 24, 9, 8, 23, 35, 60, 10, 15, 36, 59, 155, 84, 13, 16, 47, 95, 275, 239, 144, 14, 19, 48, 119, 335, 575, 779, 180, 17, 20, 71, 120, 359, 659, 1499, 2855, 264, 18, 27, 72, 179, 419, 839, 1535, 4199, 5279, 420, 21, 28, 83, 204, 504 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
This is a permutation of natural numbers provided that the sequence A112046 contains only prime values [which is true] and every prime occurs infinitely many times there.
LINKS
EXAMPLE
The top left corner of the array:
1, 2, 5, 6, 9, 10, ...
3, 4, 7, 8, 15, 16, ...
11, 12, 23, 36, 47, ...
CROSSREFS
A112070(x, y) = 2*A(X, Y)+1. Transpose: A112061. Column 1: A112051. Row 1: A042963, Row 2: A112062, Row 3: A112063, Row 4: A112064, Row 5: A112065, Row 6: A112066, Row 7: A112067, Row 8: A112068, Row 9: A112069.
Cf. also A227196.
Sequence in context: A079521 A325549 A370895 * A084933 A355065 A213900
KEYWORD
nonn,tabl
AUTHOR
Antti Karttunen, Aug 27 2005
STATUS
approved

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Last modified June 23 08:25 EDT 2024. Contains 373629 sequences. (Running on oeis4.)