A355894 Let A354790(n) = Product_{i >= 1} prime(i)^e(i); then a(n) is the concatenation, in reverse order, of e_1, e_2, ..., ending at the exponent of the largest prime factor of A354790(n); a(1)=0 by convention.

0, 1, 10, 100, 1000, 10000, 11, 100000, 1000000, 10000000, 100000000, 1000000000, 10000000000, 1100, 10001, 100000000000, 100010, 1000000000000, 10000000000000, 100000000000000, 1000000000000000, 10000000000000000, 100000000000000000, 1000000000000000000, 10000000000000000000

Offset: 0

Author

N. J. A. Sloane, Aug 25 2022

Keywords

• nonn

Comments

The terms of A354790 are squarefree, so here the exponents e_i are 0 or 1.

This bears the same relation to A354790 as A355893 does to A090252.

Examples

			The terms, right-justified, for comparison with A355892 and A355893, are:
   1 ...................................0
   2 ...................................1
   3 ..................................10
   4 .................................100
   5 ................................1000
   6 ...............................10000
   7 ..................................11
   8 ..............................100000
   9 .............................1000000
  10 ............................10000000
  11 ...........................100000000
  12 ..........................1000000000
  13 .........................10000000000
  14 ................................1100
  15 ...............................10001
  16 ........................100000000000
  17 ..............................100010
  18 .......................1000000000000
  19 ......................10000000000000
  20 .....................100000000000000
  21 ....................1000000000000000
  22 ...................10000000000000000
  23 ..................100000000000000000
  24 .................1000000000000000000
  ...
		

Links

• Michael De Vlieger, Table of n, a(n) for n = 0..1051

Crossrefs

Cf. A090252, A354790, A355893.