A064263 a(n) = 11*n mod 30.

0, 11, 22, 3, 14, 25, 6, 17, 28, 9, 20, 1, 12, 23, 4, 15, 26, 7, 18, 29, 10, 21, 2, 13, 24, 5, 16, 27, 8, 19, 0, 11, 22, 3, 14, 25, 6, 17, 28, 9, 20, 1, 12, 23, 4, 15, 26, 7, 18, 29, 10, 21, 2, 13, 24, 5, 16, 27, 8, 19, 0, 11, 22, 3, 14, 25, 6, 17, 28, 9, 20

Offset: 0

Author

N. J. A. Sloane, Sep 24 2001

Keywords

• nonn
• easy

Comments

Epact in Julian calendar for a year with Golden Number n+1.

References

• B. Blackburn and L. Hollford-Stevens, The Oxford Companion to the Year, Oxford, 1999; see p. 821.

Links

• Harry J. Smith, Table of n, a(n) for n = 0..1000
• Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).

Programs

Mathematica

Mod[11*Range[0,80],30] (* Harvey P. Dale, Mar 13 2014 *)

PARI

a(n) = { 11*n % 30 } \\ Harry J. Smith, Sep 10 2009