A281067 a(1) = 1; a(n) is the smallest natural number such that a(n) > a(n-1), and the name of a(n) in English starts with the letter a(n-1) ends with, and a(n) makes the sequence extendable.

1, 8, 10, 19, 91, 801, 802, 1001, 8001, 8002, 100001, 800001, 800002, 1000000, 9000000, 9000001, 11000000, 19000000, 19000001, 80000000, 90000000, 90000001, 800000000, 900000000, 900000001, 8000000000, 9000000000, 9000000001, 11000000000, 19000000000, 19000000001, 80000000000, 90000000000, 90000000001

Offset

1,2

Comments

"a(n) makes the sequence extendable" means the name of a(n) does not end with any of the letters r, x, y and d.

Links

Table of n, a(n) for n=1..34.

Example

If a(5) were 90 (ninety, which ends with y), it would make the sequence finite. Therefore, a(5) has to be 91.

Crossrefs

Cf. A277971, A277972, A281068.

Sequence in context: A022322 A302637 A230862 * A070974 A300022 A346783

Adjacent sequences: A281064 A281065 A281066 * A281068 A281069 A281070

Keyword

easy,nonn,word

Author

Ivan N. Ianakiev, Jan 14 2017

Status

approved