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A060940
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Triangle in which n-th row gives the phi(n) terms appearing as initial primes in arithmetic progressions with difference n, with initial term equal to the smallest positive residue coprimes to n.
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0
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2, 3, 7, 5, 5, 7, 11, 7, 13, 19, 7, 11, 29, 23, 17, 11, 19, 13, 17, 11, 13, 23, 19, 11, 13, 23, 43, 17, 11, 13, 17, 19, 23, 13, 47, 37, 71, 17, 29, 19, 31, 43, 13, 17, 19, 23, 53, 41, 29, 17, 31, 19, 59, 47, 61, 23, 37, 103, 29, 17, 19, 23, 53, 41, 31, 17, 19, 37, 23, 41, 43, 29
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| For differences 1, 2, 3, 4, 5, 6, 7, .. the initial primes are 2; 3; 7, 5; 5, 7; 11, 7, 13, 19; 7, 11; 29, 23, 17, 11, 19, 13; ... etc. Suitable initial values (coprimes to difference) are in A038566. Position of end(start) of rows is given by values of A002088.
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CROSSREFS
| Cf. A002088, A038566, A034693, A034694, A002144, A007519, etc..
Sequence in context: A086885 A082734 A021425 * A205299 A069771 A076986
Adjacent sequences: A060937 A060938 A060939 * A060941 A060942 A060943
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KEYWORD
| nonn,tabf
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), May 07 2001
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