The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A129248 a(n) = n-th prime of class 14- according to the Erdős-Selfridge classification. 6
 377982107, 437391349, 716174549, 742922699, 1385934359, 1603768277, 1780127639, 1790436371, 1895437139, 1968261067, 2066951933, 2109424013, 2148523669, 2150787839, 2238778847, 2299583987, 2334899909, 2368121663 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a[1..2] calculated using A081641[1..11]; a[3] <= 716174549. LINKS M. F. Hasler, Table of n, a(n) for n=1..339 FORMULA { a(n) } = { p = 2*m*A081641(k)+1 | k=1,2,...,oo and m=1,2,... such that p is prime and m has no factor of class > 13- } PROG (PARI) A129248 = nextclassminus(A081641) /* cf. A081640 */ CROSSREFS Cf. A056637, A081640, A081641, A129249, A129250. Sequence in context: A101640 A233798 A230528 * A204807 A257954 A218455 Adjacent sequences:  A129245 A129246 A129247 * A129249 A129250 A129251 KEYWORD nonn AUTHOR M. F. Hasler, Apr 05 2007, Apr 21 2007 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 21 04:10 EDT 2021. Contains 347596 sequences. (Running on oeis4.)