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A153005
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Primes in toothpick sequence A153003.
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0
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7, 31, 127, 211, 487, 571, 643, 811, 1033, 1249, 1663, 1999, 2131, 2179, 2281, 2347, 2467, 3391, 4801, 5059, 6361, 7759, 8191, 8209, 8713, 8779, 8929, 9187, 9343, 9679, 9931, 10687, 13903, 14947, 19009, 19267, 19423, 25057, 26731, 28879, 33289, 35521
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..42.
David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
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MAPLE
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read("transforms3") ; a139250 := BFILETOLIST("b139250.txt") ; A139250 := proc(n) global a139250; op(n+1, a139250) ; end: A153003 := proc(n) if n =0 then 0; else 1+3/4*(A139250(n+1)-3) ; fi; end: for n from 0 to 400 do p := A153003(n) ; if isprime(p) then printf("%d, ", p) ; fi; od: [From R. J. Mathar, Jul 13 2009]
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CROSSREFS
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Cf. A139250, A139253, A152998, A152999, A153000, A153002, A153003, A153006, A153009.
Sequence in context: A002184 A002588 A036280 * A056909 A002147 A169785
Adjacent sequences: A153002 A153003 A153004 * A153006 A153007 A153008
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KEYWORD
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nonn
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AUTHOR
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Omar E. Pol, Jan 02 2009
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EXTENSIONS
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More terms from R. J. Mathar, Jul 13 2009
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STATUS
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approved
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