A277834 - cp's OEIS frontend

A277834 Number of '4' digits in the set of all numbers from 0 to A014824(n) = Sum_{i=1..n} i*10^(n-i) = (0, 1, 12, 123, 1234, 12345, ...).

n	a(n)
0	0
1	0
2	1
3	22
4	344
5	4671
6	59053
7	713985
8	8374417
9	96089849
10	1084355281
11	12078120713
12	133126886145
13	1454725651577
14	15781824417015
15	170163923182508
16	1825096021948551
17	19485528120720094
18	207200960219546637
19	2195466392318923180
20	23189231824423799723

[0, 0, 1, 22, 344, 4671, 59053, 713985, 8374417, 96089849, 1084355281, 12078120713, 133126886145, 1454725651577, 15781824417015, 170163923182508, 1825096021948551, 19485528120720094, 207200960219546637, 2195466392318923180, 23189231824423799723]

cp's OEIS Frontend

A277834 Number of '4' digits in the set of all numbers from 0 to A014824(n) = Sum_{i=1..n} i*10^(n-i) = (0, 1, 12, 123, 1234, 12345, ...).

Table of values

List of values