A307747 Terms in A307720 in order of appearance.

1, 2, 3, 4, 5, 7, 6, 8, 9, 10, 11, 13, 12, 14, 15, 17, 19, 16, 18, 23, 29, 20, 21, 24, 25, 26, 27, 22, 28, 30, 31, 37, 35, 33, 41, 43, 47, 53, 49, 39, 45, 32, 34, 36, 38, 59, 61, 55, 51, 57, 56, 58, 67, 71, 62, 63, 65, 64, 46, 48, 40, 44, 42, 50, 52, 54, 73

Offset

1,2

Links

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, Colored scatterplot of the first 10000 terms (red pixels correspond to prime terms)

Rémy Sigrist, C++ program for A307747

Example

The first terms of A307720 are (with periodic parts in parentheses):
    1,1,2,(1,3)*2,(2,2)*2,(2,3)*3,(3,3)*4,3,(4,2)*4,(4,3)*6,(5,1)*3,(7,1)*3,7,...
    *   *    *                               *               *       *
The terms marked with a star give the sequence:
    1,  2,   3,                              4,              5,      7,...

Prog

(C++) See Links section.

Crossrefs

Cf. A307720.

Sequence in context: A122313 A130988 A069769 * A347758 A154439 A154440

Adjacent sequences: A307744 A307745 A307746 * A307748 A307749 A307750

Keyword

nonn

Author

Rémy Sigrist, Apr 26 2019

Status

approved