A139097 Form a sequence of words as follows: look to the left, towards the beginning of the sequence and write down the number of letters you see; repeat; then replace the words with the corresponding numbers.
0, 4, 8, 13, 21, 30, 36, 45, 54, 63, 73, 85, 95, 105, 119, 137, 158, 178, 200, 211, 227, 248, 268, 288, 309, 325, 347, 369, 390, 408, 424, 445, 465, 485, 506, 520, 537, 559, 579, 601, 614, 632, 651, 669, 688, 709, 725, 747, 769, 790, 808, 825, 847, 869, 890, 908, 924, 945, 965, 985, 1006, 1020, 1037, 1059
Offset: 0
Examples
The second word is "four" (and so a(2)=4), because at the end of the first word we can see four letters to the left.
References
- E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 32-35, Volume 59 (Jeux math'), April/June 2008, Paris.
Links
- M. F. Hasler, Table of n, a(n) for n = 0..423
Extensions
Edited by N. J. A. Sloane, Jun 08 2008
More terms from M. F. Hasler and R. J. Mathar, Jun 15 2008
Comments