A164790 -id:A164790 - cp's OEIS frontend

A362122 a(n) is the smallest positive number whose British English name has the letter "e" in the n-th position.

8, 7, 1, 3, 3, 12, 13, 17, 21, 23, 23, 73, 1700, 108, 107, 101, 103, 103, 112, 113, 117, 121, 123, 123, 173, 323, 373, 1103, 1103, 1112, 1113, 1117, 1121, 1123, 1123, 1173, 1323, 1373, 3323, 3373, 11373, 13323, 13373, 17373, 23323, 23373, 73373, 101123, 101173, 101323

Offset: 1

N. J. A. Sloane, Apr 20 2023

GCHQ, The GCHQ Puzzle Book, Penguin, 2016. See page 70.

See A164790, A362120, and A362121 for other versions.

print(list(islice(A362121gen(t="e", i0=1), 50))) # Michael S. Branicky, Apr 21 2023

a(n) = A362121(n) except at n = 2. - Michael S. Branicky, Apr 21 2023

a(14) and beyond from Michael S. Branicky, Apr 21 2023

A173203 a(n) is the smallest number which has in its English name the letter "e" in the n-th position beginning the count from the end, or -1 if no such number exists.

Original entry on oeis.org

1, 3, 13, 7, 8, 11, 21, 17, 23, 74, 73, 104, 103, 111, 115, 113, 117, 124, 123, 173, 373, 723, 773, 873, 1103, 1111, 1115, 1113, 1117, 1124, 1123, 1173, 1323, 1373, 3373, 7323, 7373, 8373, 11373, 17323, 17373, 23373, 73323, 73373, 103323, 103373, 111373

Offset: 1

Claudio Meller, Feb 12 2010

			a(1) = onE, a(2) = thrEe, a(3) =thirtEen, a(4) = sEven, a(5) = Eight, a(6) = Eleven, etc.

Robert P. P. McKone, Table of n, a(n) for n = 1..58

Cf. A164790 ("e" in n-th position).

Cf. A173204 (similar for "n"), A173206 (similar for "t").

ePos[n_] := Flatten@Position[DeleteCases[Reverse@Characters@IntegerName[n, "Words"], a_ /; MemberQ[{" ", "\[Hyphen]"}, a]], "e"]; t = {}; i = 1; Monitor[Table[Do[If[MemberQ[ePos[i], n], Return[lst = AppendTo[t, i]; i = 1; lst], i++], \[Infinity]], {n, 1, 47, 1}] // Last, {ProgressIndicator[n, {1, 47}], n, i}] (* Robert P. P. McKone, Feb 07 2022 *)

More terms from Robert P. P. McKone, Feb 08 2022

cp's OEIS Frontend

A362122 a(n) is the smallest positive number whose British English name has the letter "e" in the n-th position.

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