A046861 Lower members of a "good pair" of the form (k, 2*k +- 1).

1, 7, 11, 31, 41, 49, 109, 127, 139, 143, 151, 173, 179, 203, 217, 397, 491, 511, 521, 539, 547, 589, 599, 683, 749, 803, 929, 989, 2041, 2047, 2107, 2153, 2191, 2219, 2531, 2693, 2723, 2761, 2999, 3661, 3721, 3739, 6199, 6923, 7949

Offset

1,2

Links

Table of n, a(n) for n=1..45.

N. G. de Bruijn, Some direct decompositions of the set of integers, Math. Comp., 18 (1964), 537-546.

Sean A. Irvine, Java program (github)

Crossrefs

Cf. A046862, A000696.

Sequence in context: A121534 A083363 A027707 * A078917 A291349 A293046

Adjacent sequences: A046858 A046859 A046860 * A046862 A046863 A046864

Keyword

nonn,easy,nice

Author

N. J. A. Sloane

Extensions

Reference gives 45 terms.

More terms from Pab Ter (pabrlos2(AT)yahoo.com), Nov 06 2005

Offset corrected and title improved by Sean A. Irvine, Apr 29 2021

Status

approved