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

Author

Jud McCranie, Jul 22 2012

Keywords

• nonn

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

Examples

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

Links

• Jud McCranie, Known terms up to 890

Crossrefs

Cf. A002858, A080287, A080288.