A229942 Number of exposed toothpick endpoints in the n-th row of the toothpick structure of A229940 (also A229950).
0, 1, 2, 2, 2, 2, 2, 3, 3, 2, 3, 4, 3, 2, 3, 4, 3, 3, 4, 4, 3, 2, 4, 6, 4, 2, 3, 4, 4, 4, 4, 5, 4, 2, 4, 6, 4, 2, 4, 6, 5, 4, 4, 4, 3, 2, 5, 8, 5, 3, 4, 4, 4, 4, 5, 6, 4, 2, 5, 8, 5, 2, 4, 6, 5, 4, 4, 4, 4, 4, 6, 9, 6, 2, 3, 4, 4, 4, 6, 8, 5, 2, 5, 8, 5, 2
Offset: 1
Keywords
Examples
Illustration of initial terms: --------------------------------------------------- A229940 Diagram n a(n) A000005 --------------------------------------------------- . 1 0 . 2 1 1 1; | 3 2 0; 4 2 2 1; | 5 2 0; 6 2 2 1; | 7 2 0; 8 3 3 1, 1; | | 9 3 0, 1; | 10 2 2 1, 1; | | 11 3 0, 0; 12 4 4 1, 1; | | 13 3 0, 1; | 14 2 2 1, 1; | | 15 3 0, 0; 16 4 4 1, 1; | | 17 3 0, 1; | 18 3 3 1, 1, 1; | | | 19 4 0, 0, 1; | 20 4 4 1, 1, 1; | | | 21 3 0, 1, 1; | | 22 2 2 1, 1, 1; | | | 23 4 0, 0, 0; 24 6 6 1, 1, 1; | | | 25 4 0, 1, 1; | | 26 2 2 1, 1, 1; | | | 27 3 0, 0, 1; | 28 4 4 1, 1, 1; | | | 29 4 0, 1, 0; | 30 4 4 1, 1, 1; | | | 31 4 0, 0, 1; | 32 5 5 1, 1, 1, 1; | | | | ---------------------------------------------------
Links
- Omar E. Pol, Illustration of initial terms of the divisor function (A000005), see the third picture.
- N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
- Index entries for sequences related to toothpick sequences
Comments