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A136040
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Classes of the phi iteration for which the smallest number is prime.
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3
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 14, 16, 17, 19, 21, 22, 25, 26, 29, 31, 41, 49, 51, 52, 55, 58, 59, 60, 63, 65, 66, 67, 69, 71, 74, 77, 79, 81, 82, 87, 89, 108, 109, 113, 114, 116, 119, 122, 124, 127, 129, 130, 136, 137, 142, 143, 145, 147, 148, 151, 154, 158, 159, 161, 162, 163
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Rows of A058812 which begin with a prime. The actual primes are in A092873, which is A007755(n+2) for the n in this sequence.
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REFERENCES
| Harold Shapiro, An arithmetic function arising from the phi function, Amer. Math. Monthly, Vol. 50, No. 1 (1943), 18-30.
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LINKS
| T. D. Noe, Table of n, a(n) for n=1..288
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CROSSREFS
| Sequence in context: A108155 A134932 A134933 * A153041 A194846 A194057
Adjacent sequences: A136037 A136038 A136039 * A136041 A136042 A136043
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KEYWORD
| nonn
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AUTHOR
| T. D. Noe (noe(AT)sspectra.com), Dec 12 2007
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EXTENSIONS
| Added 63 and 159. - T. D. Noe (noe(AT)sspectra.com), Nov 18 2008
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