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A075520
4*prime(n) + (prime(n) mod 4).
5
10, 15, 21, 31, 47, 53, 69, 79, 95, 117, 127, 149, 165, 175, 191, 213, 239, 245, 271, 287, 293, 319, 335, 357, 389, 405, 415, 431, 437, 453, 511, 527, 549, 559, 597, 607, 629, 655, 671, 693, 719, 725, 767, 773, 789, 799, 847, 895, 911, 917, 933, 959, 965
OFFSET
1,1
LINKS
FORMULA
a(n) = A001749(n) + A039702(n).
MATHEMATICA
4#+Mod[#, 4]&/@Prime[Range[60]] (* Harvey P. Dale, Mar 10 2016 *)
PROG
(Haskell)
a075520 n = a075520_list !! (n-1)
a075520_list = zipWith (+) a001749_list a039702_list
-- Reinhard Zumkeller, Feb 20 2012
CROSSREFS
Sequence in context: A062691 A257630 A129496 * A030663 A013638 A075524
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Sep 19 2002
STATUS
approved