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Search: id:A083433
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| A083433 |
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a(1) = 1; a palindrome is included in the sequence if it has a prime signature that is different from all previous terms. |
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1
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| 1, 2, 4, 6, 8, 44, 66, 88, 252, 272, 414, 484, 616, 858, 2112, 2772, 2992, 4004, 4224, 6006, 6336, 6776, 8008, 8448, 14641, 25952, 27872, 27972, 29592, 29792, 36963, 40404, 42224, 42624, 44544, 44944, 48384, 63336, 63536, 63936, 69696, 84448
(list; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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66 = 2*3*11 is the smallest palindrome with prime signature p*q*r;
252 = 2^2*3^2*7 is the smallest palindrome with prime signature p^2*q^2*r;
77 is not a member as 6 which is a member has the same prime signature p*q;
where p,q,r are primes.
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CROSSREFS
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Cf. A083434, A083435.
Sequence in context: A068541 A108425 A059569 this_sequence A083435 A163502 A110995
Adjacent sequences: A083430 A083431 A083432 this_sequence A083434 A083435 A083436
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy and Meenakshi Srikanth (amarnath_murthy(AT)yahoo.com), Apr 29 2003
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EXTENSIONS
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Corrected and extended by David Wasserman (wasserma(AT)spawar.navy.mil), Nov 03 2004
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