login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A271534 Numbers n with digits abc..xyz such that n = (a + b + c + ... + x + y + z) + (a^b + b^c + c^d + ... + x^y + y^z). 0
1, 2, 3, 4, 5, 6, 7, 8, 9, 33, 92, 1683552 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(12) is the last term. The sequence is finite because it can't contain numbers with more than 10 digits. Both conventions for indeterminate form 0^0, i.e., 0^0=0 and 0^0=1, lead to the same values. - Giovanni Resta, Apr 12 2016

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

33 is a term because 33 = 3 + 3 + 3^3.

1683552 is a term because 1683552 = (1 + 6 + 8 + 3 + 5 + 5 + 2) + (1^6 + 6^8 + 8^3 + 3^5 + 5^5 + 5^2).

MATHEMATICA

Unprotect[Power]; Power[0, 0]=1; okQ[n_]:=Block[{d = IntegerDigits[n]}, n == Plus @@ d + Plus @@ Power @@@ Partition[d, 2, 1]]; Select[Range[2*10^6], okQ] (* Giovanni Resta, Apr 12 2016 *)

CROSSREFS

Cf. A005188.

Sequence in context: A261279 A295638 A173551 * A072482 A254958 A302502

Adjacent sequences:  A271531 A271532 A271533 * A271535 A271536 A271537

KEYWORD

nonn,base,fini,full

AUTHOR

José de Jesús Camacho Medina, Apr 09 2016

EXTENSIONS

a(12) from Giovanni Resta, Apr 12 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 24 14:04 EDT 2019. Contains 321448 sequences. (Running on oeis4.)