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A346216 a(n) = (10^n)-th Ulam number A002858. 0
1, 18, 690, 12294, 132788, 1351223, 13509072, 135160791, 1351856726, 13517664323 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

The terms a(0)-a(4) are from the b-file for A002858. The remaining terms are from the paper by Philip Gibbs. As the sequence settles, its terms lie very close to the straight line 13.51*n.

LINKS

Table of n, a(n) for n=0..9.

Philip Gibbs, An Efficient Method for Computing Ulam Numbers, viXra:1508.0085 (2015).

Wikipedia, Ulam number.

FORMULA

a(n) = A002858(10^n).

CROSSREFS

Cf. A002858.

Sequence in context: A041612 A046674 A073421 * A295439 A159873 A259458

Adjacent sequences:  A346213 A346214 A346215 * A346217 A346218 A346219

KEYWORD

nonn,more

AUTHOR

Frank M Jackson, Oct 16 2021

EXTENSIONS

a(5)-a(9) from Philip Gibbs and Jud McCranie, Feb 29 2012 - Sep 09 2015

STATUS

approved

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Last modified August 18 16:51 EDT 2022. Contains 356215 sequences. (Running on oeis4.)