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A263027 a(n) = A002322(n) + 1, where A002322 is Carmichael lambda. 5
2, 2, 3, 3, 5, 3, 7, 3, 7, 5, 11, 3, 13, 7, 5, 5, 17, 7, 19, 5, 7, 11, 23, 3, 21, 13, 19, 7, 29, 5, 31, 9, 11, 17, 13, 7, 37, 19, 13, 5, 41, 7, 43, 11, 13, 23, 47, 5, 43, 21, 17, 13, 53, 19, 21, 7, 19, 29, 59, 5, 61, 31, 7, 17, 13, 11, 67, 17, 23, 13, 71, 7 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The function t(k,n) = A002322(n)+k provides many prime values for k=1: for n up to 1000, for example, it returns 798 primes (with repetitions). On the other hand, for n <= 1000 and odd k from 3 to 11, t(k,n) gives 247, 387, 538, 231, 504 prime values, respectively.

Another function of this type is |A002322(n)-119|, which provides 693 prime values for n <= 1000. [Bruno Berselli, Oct 14 2015]

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..5000

MATHEMATICA

Table[CarmichaelLambda[n] + 1, {n, 1, 100}]

PROG

(MAGMA) [2] cat [CarmichaelLambda(n)+1: n in [2..100]];

(PARI) vector(100, n, 1 + lcm(znstar(n)[2])) \\ Altug Alkan, Oct 08 2015

CROSSREFS

Cf. A002322.

Cf. A263028: indices n for which a(n) is prime.

Cf. A263029: indices n for which a(n) is composite.

Cf. also A039649, A296076, A296077.

Sequence in context: A102347 A230846 A204908 * A069974 A039650 A039649

Adjacent sequences:  A263024 A263025 A263026 * A263028 A263029 A263030

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Oct 08 2015

EXTENSIONS

Edited by Bruno Berselli, Oct 14 2015

STATUS

approved

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Last modified August 22 16:17 EDT 2019. Contains 326178 sequences. (Running on oeis4.)