A214603 Location of the first gap of exactly n in Ulam numbers, or zero if none is known. The zero terms are conjectural.

1, 4, 8, 53, 48, 0, 62, 18, 38, 87, 0, 114, 260, 0, 221, 0, 568, 0, 627, 155, 0, 646, 0, 1724, 695, 0, 282, 0, 1433, 751, 0, 36460, 0, 949, 483379914, 0, 8018, 0, 1257, 0, 1553, 1858, 0, 4057, 0, 9262, 3825, 0, 10606, 0, 115835, 3153, 0, 0, 0, 6982

Offset

1,2

Comments

Some terms are not believed to exist. However, the first gap of 35 occurs at 483379914 and the first gap of 88 occurs at 1127544124. - Jud McCranie, Jul 31 2012

Links

Table of n, a(n) for n=1..56.

Jud McCranie, Known terms up to 890

Example

The first gap of 5 in Ulam numbers occurs after 48, so a(5) = 48.

Crossrefs

Cf. A002858, A080287, A080288.

Sequence in context: A358791 A215746 A128893 * A192508 A231601 A347511

Adjacent sequences: A214600 A214601 A214602 * A214604 A214605 A214606

Keyword

nonn

Author

Jud McCranie, Jul 22 2012

Status

approved