A130146 - OEIS

%I #14 Nov 15 2022 12:25:53

%S 1,2,2,3,3,3,4,4,4,4,5,5,5,5,5,6,6,6,6,6,6,7,7,7,7,7,7,7,8,8,8,8,8,8,

%T 8,8,9,9,9,9,9,9,9,9,9,11,12,12,13,13,13,14,14,14,14,15,15,15,15,15,

%U 16,16,16,16,16,16,17,17,17,17,17,17,17,18,18,18,18,18,18,18,18,19,19,19,19

%N n appears k times, where k = last digit of n.

%o (Python)

%o from itertools import count, islice

%o def A130146_gen(): # generator of terms

%o     yield from (n for n in count(1) for _ in range(n%10))

%o A130146_list = list(islice(A130146_gen(),50)) # _Chai Wah Wu_, Nov 14 2022

%Y Cf. A010879, A001462.

%K nonn,base

%O 1,2

%A _Paul Curtz_, Aug 02 2007