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Search: id:A082279
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| A082279 |
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a(1)=1, a(2)=2 and a(n+1) is minimal such that there are a(n-1) primes strictly between a(n) and a(n+1). |
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4
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| 1, 2, 4, 8, 20, 54, 152, 464, 1532, 5334, 19764, 77042, 316760, 1361630, 6129422, 28709012, 139999730, 707500404, 3705539918, 20045427240, 111972406422, 644198989898, 3815636759538
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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2 is the only prime in the sequence.
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EXAMPLE
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There are 4 primes (11,13,17,19) between 8 and the next term 20.
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MATHEMATICA
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a[1]=1; a[2]=2; a[n_] := a[n]=1+Prime[1+Sum[a[i], {i, 1, n-2}]]
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CROSSREFS
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Cf. A082278.
Adjacent sequences: A082276 A082277 A082278 this_sequence A082280 A082281 A082282
Sequence in context: A089976 A000980 A123611 this_sequence A113180 A000116 A006407
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KEYWORD
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more,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 13 2003
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EXTENSIONS
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Better description from Vladeta Jovovic (vladeta(AT)eunet.yu), Apr 15 2003
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