A141278 Clusters of consecutive composites in A141089.

25, 26, 48, 49, 114, 115, 123, 124, 212, 213, 287, 288, 332, 333, 342, 343, 398, 399, 415, 416, 440, 441, 446, 447, 470, 471, 488, 489, 510, 511, 512, 548, 549, 553, 554, 603, 604, 638, 639, 640, 648, 649, 675, 676, 771, 772, 785, 786, 818, 819, 836, 837

Offset

1,1

Comments

A141089 contains composites A002808(k) such that the partial sum A053767(k) divides the partial product A036691(k). The sequence contains the subsequences of A141089 that contain two or more consecutive integers.

Links

Table of n, a(n) for n=1..52.

Formula

Numbers A141089(i) such that either 1+A141089(i) = A141089(i+1) or A141089(i)-1 = A141089(i-1) or both.

Example

The first pair of consecutive integers is (25,26) in A141089(6,7), the second (48,49) in A141089(9,10).
Triples of consecutive integers in A141089 are (510,511,512), (638,639,640), (889,890,891), (912,913,914), quadruples are (987,988,989,990), etc, all members included here.

Crossrefs

Cf. A141089 A141090 A141091 A141092 A141274 A141275.

Sequence in context: A195331 A175426 A045567 * A022395 A042260 A042262

Adjacent sequences: A141275 A141276 A141277 * A141279 A141280 A141281

Keyword

easy,nonn

Author

Enoch Haga, Jun 21 2008

Extensions

Edited by R. J. Mathar, Jul 08 2008

Status

approved