A079664 a(n) = Sum_{i=1..n} LookAndSay(i).

11, 23, 36, 50, 65, 81, 98, 116, 135, 1245, 1266, 2378, 3491, 4605, 5720, 6836, 7953, 9071, 10190, 11400, 12611, 12633, 13846, 15060, 16275, 17491, 18708, 19926, 21145, 22455, 23766, 25078, 25101, 26415, 27730, 29046, 30363, 31681, 33000, 34410

Offset

1,1

Comments

A question related to this sequence: prove the convergence or divergence of the infinite series Sum_{i>=1} 1/LookAndSay(i). (Numerical experiments suggest that this diverges slowly.)

Links

Table of n, a(n) for n=1..40.

Example

a(2) = LookAndSay(1) + LookAndSay(2) = 11 (one "1") + 12 (one "2") = 23.

Crossrefs

Partial sums of A047842, n>=1.

Sequence in context: A180316 A139793 A101859 * A160268 A135978 A280915

Adjacent sequences: A079661 A079662 A079663 * A079665 A079666 A079667

Keyword

base,nonn

Author

Joseph L. Pe, Jan 26 2003

Status

approved