1,2

a(1) = 1; for n>1, a(n) = numbers of letters in Polish name for a(n-1).

Robert Bilinski, Table of n, a(n) for n = 1..99

Index entries for linear recurrences with constant coefficients, signature (0,0,1).

Jeden, pięć, cztery, sześć, pięć, ...

Cf. A008962 (number of letters).

Cf. A000655 (English), A061504 (French), A101432 (Spanish).

Sequence in context: A298513 A021187 A075194 * A138255 A153451 A190143

Adjacent sequences: A328260 A328261 A328262 * A328264 A328265 A328266

nonn,word,easy

Robert Bilinski, Oct 09 2019

approved