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.

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

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