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 A083409 Number of prime k-tuplet constellations, i.e., patterns with minimal diameter A008407. 5
 1, 2, 1, 2, 1, 2, 3, 4, 2, 2, 2, 6, 2, 4, 2, 4, 2, 4, 2, 2, 4, 2, 4, 18, 2, 8, 10, 2, 2, 2, 4, 14, 20, 2, 2, 2, 6, 26, 26, 8, 2, 6, 18, 4, 4, 4, 2, 2, 22, 22, 2, 2, 26, 6, 6, 2, 2, 4, 2, 2, 6, 2, 2, 2, 2, 18, 2, 20, 2, 2, 2, 10, 2, 14, 14, 40, 8, 2, 14, 14, 16, 4, 2, 2, 60, 50, 2, 2, 2, 16, 2, 18, 12 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,2 LINKS T. D. Noe, Table of n, a(n) for n=2..305 (from Engelsma's data) Thomas J Engelsma, Permissible Patterns. Tony Forbes and Norman Luhn, Patterns of prime k-tuplets & the Hardy-Littlewood constants. Eric Weisstein's World of Mathematics, k-Tuple Conjecture. EXAMPLE For a(8) = 3 octuplet patterns see A065706. for a(6) = 1 sextet see A061671. CROSSREFS Cf. A008407, A020497, A023193, A061671, A065688, A065706. Sequence in context: A074641 A069003 A087855 * A344779 A317586 A303780 Adjacent sequences: A083406 A083407 A083408 * A083410 A083411 A083412 KEYWORD nonn AUTHOR Frank Ellermann, Jun 07 2003 EXTENSIONS More terms from Engelsma's website sent by T. D. Noe, Jul 21 2006 STATUS approved

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Last modified April 23 20:27 EDT 2024. Contains 371916 sequences. (Running on oeis4.)