A161376 Number of letters in Spanish words for months of the year.

5, 7, 5, 5, 4, 5, 5, 6, 10, 7, 9, 9, 5, 7, 5, 5, 4, 5, 5, 6, 10, 7, 9, 9, 5, 7, 5, 5, 4, 5, 5, 6, 10, 7, 9, 9, 5, 7, 5, 5, 4, 5, 5, 6, 10, 7, 9, 9, 5, 7, 5, 5, 4, 5, 5, 6, 10, 7, 9, 9, 5, 7, 5, 5, 4, 5, 5, 6, 10, 7, 9, 9, 5, 7, 5, 5, 4, 5, 5, 6, 10, 7, 9, 9

Offset: 1

Author

Claudio Meller, Jun 08 2009

Keywords

• nonn
• word
• easy

Comments

Enero = 5 letters; Febrero = 7; Marzo = 5; Abril = 5; Mayo = 4; Junio = 5; Julio = 5; Agosto = 6; Septiembre = 10; Octubre = 7; Noviembre = 9; Diciembre = 9.

Period 12: repeat [5, 7, 5, 5, 4, 5, 5, 6, 10, 7, 9, 9].

Links

• Index entries for sequences related to calendars.
• Index to 12-periodic sequences.
• Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,0,0,0,0,0,1).

Crossrefs

Cf. A031139, A182495.

Formula

From Elmo R. Oliveira, Jul 18 2024: (Start)

G.f.: x*(5 + 7*x + 5*x^2 + 5*x^3 + 4*x^4 + 5*x^5 + 5*x^6 + 6*x^7 + 10*x^8 + 7*x^9 + 9*x^10 + 9*x^11)/(1 - x^12).

a(n) = a(n-12) for n > 12. (End)

Extensions

a(37)-a(84) from Elmo R. Oliveira, Jul 18 2024