A129646 Concatenated list of the positive divisors of the terms of sequence A129645.

1, 1, 2, 1, 3, 1, 7, 1, 2, 4, 8, 1, 5, 25, 1, 2, 13, 26, 1, 3, 61, 183, 1, 2, 4, 8, 23, 46, 92, 184, 1, 3, 9, 41, 123, 369, 1, 7, 211, 1477, 1, 3, 9, 13, 39, 101, 117, 303, 909, 1313, 3939, 11817, 1, 2, 19, 38, 311, 622, 5909, 11818, 1, 3, 19697, 59091

Offset

1,3

Links

Table of n, a(n) for n=1..64.

Formula

a(n) = (A129645(n+1)-1)/A129645(n).

Example

Triangle begins:
  1;
  1, 2;
  1, 3;
  1, 7;
  1, 2, 4, 8;
  1, 5, 25;
  1, 2, 13, 26;
  1, 3, 61, 183;
  1, 2, 4, 8, 23, 46, 92, 184;

Crossrefs

Cf. A129645.

Sequence in context: A262598 A370899 A191854 * A277640 A370906 A165401

Adjacent sequences: A129643 A129644 A129645 * A129647 A129648 A129649

Keyword

nonn,tabf

Author

Leroy Quet, Apr 25 2007

Extensions

More terms from Sean A. Irvine, Nov 25 2010

Corrected (sorted to numerical order) by Franklin T. Adams-Watters, Aug 24 2013

Status

approved