A261190 Leap years in Symmetry454 calendar, starting year AD 1.

3, 9, 15, 20, 26, 31, 37, 43, 48, 54, 60, 65, 71, 77, 82, 88, 93, 99, 105, 110, 116, 122, 127, 133, 139, 144, 150, 155, 161, 167, 172, 178, 184, 189, 195, 201, 206, 212, 217, 223, 229, 234, 240, 246, 251, 257, 263, 268, 274, 279, 285, 291, 296, 302, 308, 313

Offset: 1

Author

Felix Fröhlich, Aug 11 2015

Keywords

• nonn

Comments

Year n is a leap year if and only if ((52 * n + 146) % 293) < 52.

Links

• Felix Fröhlich, Table of n, a(n) for n = 1..10000
• I. Bromberg, 52/293 Symmetry454 (start Monday) Leap Years (Table of initial 780 terms)
• I. Bromberg, The Symmetry454 Calendar - Leap Rule
• Wikipedia, Symmetry454

Crossrefs

Cf. A057347, A057349, A189917.

Programs

PARI

is(n) = ((52*n+146)%293) < 52