A033173 Number of days in n years (n=2 is the first leap year).

365, 731, 1096, 1461, 1826, 2192, 2557, 2922, 3287, 3653, 4018, 4383, 4748, 5114, 5479, 5844, 6209, 6575, 6940, 7305, 7670, 8036, 8401, 8766, 9131, 9497, 9862, 10227, 10592, 10958, 11323, 11688, 12053, 12419, 12784, 13149, 13514, 13880

Offset: 1

Author

Jeff Burch

Keywords

• easy
• nonn

Crossrefs

Cf. A033171.

Formula

From Chai Wah Wu, Jan 27 2020: (Start)

See caveat in A033171 formula section.

a(n) = a(n-1) + a(n-4) - a(n-5) for n > 5.

G.f.: x*(365*x^3 + 366*x^2 + 365*x + 365)/(x^5 - x^4 - x + 1). (End)

Extensions

a(19) corrected by Chai Wah Wu, Jan 27 2020