A280774 Numbers k such that gcd(A280864(k), A280864(k+1)) = 1.

1, 3, 6, 10, 13, 23, 27, 30, 34, 38, 48, 54, 62, 65, 69, 86, 90, 94, 103, 120, 127, 131, 135, 139, 144, 148, 161, 165, 185, 197, 211, 255, 258, 262, 275, 286, 290, 300, 311, 319, 330, 334, 350, 354, 358, 367, 375, 379, 399, 414, 420, 427, 443, 447, 453, 457, 465, 486, 500, 504, 530, 534, 549, 555, 559

Offset

1,2

Links

N. J. A. Sloane, Table of n, a(n) for n = 1..25317

Crossrefs

Cf. A280864.

First differences give A283832.

Sequence in context: A027428 A136850 A079248 * A083505 A099588 A099531

Adjacent sequences: A280771 A280772 A280773 * A280775 A280776 A280777

Keyword

nonn

Author

N. J. A. Sloane, Jan 19 2017

Status

approved