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A256121 Lexicographically earliest increasing sequence such that the derived triangle T(n,k) = "a(n) represented in base a(k)" (with k < n) contains only distinct representations. 1
2, 3, 5, 8, 13, 17, 23, 30, 39, 54, 66, 74, 88, 107, 145, 166, 191, 209, 238, 261, 312, 343, 380, 408, 468, 507, 568, 616, 703, 769, 795, 886, 918, 1109, 1120, 1217, 1323, 1399, 1466, 1510, 1727, 1808, 1936, 2005, 2094, 2167, 2216, 2361, 2497, 2580, 2899 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

We do not take into account the unary base, hence a(1)>1.

LINKS

Paul Tek, Table of n, a(n) for n = 1..1000

Paul Tek, Perl program for this sequence

Paul Tek, first rows of the derived triangle T(n,k) = "a(n) represented in base a(k)"

PROG

(Perl) See Links section.

CROSSREFS

Cf. A005282.

Sequence in context: A221672 A241551 A070217 * A308869 A001149 A144117

Adjacent sequences:  A256118 A256119 A256120 * A256122 A256123 A256124

KEYWORD

nonn,base

AUTHOR

Paul Tek, Mar 15 2015

STATUS

approved

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Last modified August 11 04:03 EDT 2020. Contains 336421 sequences. (Running on oeis4.)