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 A070884 7 + x where x is congruent to {0, 4, 6, 10, 12, 16, 22, 24} mod 30. 1
 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 49, 53, 59, 61, 67, 71, 73, 77, 79, 83, 89, 91, 97, 101, 103, 107, 109, 113, 119, 121, 127, 131, 133, 137, 139, 143, 149, 151, 157, 161, 163, 167, 169, 173, 179, 181, 187, 191, 193, 197, 199, 203, 209, 211, 217, 221 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Sequence contains many primes. A007775 without the first term. Strictly speaking, the sequence should include the 1, because 1=7-6 and -6 = 24 mod 30. [From R. J. Mathar, Sep 25 2008] LINKS Table of n, a(n) for n=0..57. Index entries for linear recurrences with constant coefficients, signature (1,0,0,0,0,0,0,1,-1). FORMULA G.f.: ( 7+4*x+2*x^2+4*x^3+2*x^4+4*x^5+6*x^6+2*x^7-x^8 ) / ( (1+x)*(x^2+1)*(x^4+1)*(x-1)^2 ). - R. J. Mathar, Sep 22 2016 EXAMPLE 7+0=7, 7+4=11, 7+6=13, 7+10=17, 7+12=19, 7+16=23, ... PROG (Perl) \$a = 0; while (((\$a % 30 == 0 or \$a % 30 == 4 or \$a % 30 == 6 or \$a % 30 == 10 or \$a % 30 == 12 or \$a % 30 == 16 or \$a % 30 == 22 or \$a % 30 == 24) and eval("print \"\".(7+\\$a).\" \"; return 0; ")) or ++\$a) { } CROSSREFS Sequence in context: A322272 A161850 A007775 * A135777 A090459 A090417 Adjacent sequences: A070881 A070882 A070883 * A070885 A070886 A070887 KEYWORD easy,nonn AUTHOR Timothy McAlee Sr., May 24 2002 EXTENSIONS More terms from Jim McCann (jmccann(AT)umich.edu), Jul 17 2002 STATUS approved

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Last modified December 10 04:38 EST 2023. Contains 367699 sequences. (Running on oeis4.)