A271641 Quantity of ancestors for n (in the sense explained below).

9, 17, 15, 13, 11, 9, 7, 5, 3, 1, 17, 32, 29, 25, 21, 17, 13, 9, 5, 2, 15, 28, 26, 23, 19, 15, 11, 7, 4, 2, 13, 24, 22, 20, 17, 13, 9, 6, 4, 2, 11, 20, 18, 16, 14, 11, 8, 6, 4, 2, 9, 16, 14, 12, 10, 9, 8, 6, 4, 2, 7, 12, 10, 8, 7, 7, 7, 6, 4, 2, 5, 8, 6, 5, 5, 5, 5, 5, 4, 2, 3, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 17, 32

Offset: 0

Author

Eric Angelini and Jean-Marc Falcoz, Apr 11 2016

Keywords

• nonn
• base

Comments

See A271639 for the definition of an ancestor.

Examples

			"0" has 9 ancestors, which are 11, 22, 33, 44, 55, 66, 77, 88 and 99; "1" has 17 ancestors, which are 10, 12, 21, 23, 32, 34, 43, 45, 54, 56, 65, 67, 76, 78, 87, 89, 98;  "2" has 15 ancestors, which are 13, 20, 24, 31, 35, 42, 46, 53, 57, 64, 68, 75, 79, 86, 97; "3" has 13 ancestors, etc. Thus the sequence starts with 9, 17, 15, 13, etc.
		

Crossrefs

Cf. A271639.