A189124 Positive integers n such that A005245(n) < min{ A005245(n-1) + 1, A005245(x) + A005245(y) } where x,y range over positive integers with x*y = n.

353942783, 516743639, 1163385647, 1542243239, 1932319583, 2336924879, 3113713259, 3444631199, 3878989487, 4103787551, 4166809919, 4937621453, 5123340683, 5170931639, 5184740299, 5200683263, 5390865059, 5455982879, 5467766947, 5570566315

Offset

1,1

Comments

Counterexamples to the second conjecture of David Wilson on A005245.

a(1), a(2) were found by Martin Fuller; a(3) was found by Janis Iraids.

Prime terms are given by A189125.

Links

Janis Iraids, Table of n, a(n) for n = 1..1000

Martin N. Fuller, C program for A005245

Crossrefs

Cf. A005245, A189123, A189125.

Sequence in context: A219271 A167517 A227642 * A189125 A258610 A227933

Adjacent sequences: A189121 A189122 A189123 * A189125 A189126 A189127

Keyword

nonn,hard

Author

Max Alekseyev, Apr 17 2011

Extensions

More terms from Janis Iraids, Apr 20 2011

Status

approved