A306748 Unitary untouchable numbers with a record gap to the next unitary untouchable number.

2, 5, 7, 998, 15402, 21878, 382032

Offset

1,1

Comments

The record gap values are 1, 2, 367, 544, 556, 780, 782.

Links

Table of n, a(n) for n=1..7.

Example

5 is in the sequence since it is a unitary untouchable number and the next unitary untouchable number after it is 7 = 5 + 2 with a record gap of 2. The next gap which is larger than 2 occurs at 7 which is followed by 374 = 7 + 367.

Crossrefs

Cf. A063948, A306747.

Sequence in context: A007571 A350590 A062621 * A344655 A241292 A366248

Adjacent sequences: A306745 A306746 A306747 * A306749 A306750 A306751

Keyword

nonn,hard,more

Author

Amiram Eldar, Mar 07 2019

Status

approved