cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-2 of 2 results.

A090075 (Presumed) number of palindromes in the Reverse and Add! trajectory of 10^n.

Original entry on oeis.org

11, 9, 8, 9, 12, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11
Offset: 0

Views

Author

Klaus Brockhaus, Nov 20 2003

Keywords

Comments

The absolute maximum 12 at n = 4 and a(n) = 11 for n > 5 support the conjecture (cf. A077594) that there is no positive integer whose trajectory contains more than twelve palindromes.
The last palindrome in the Reverse and Add! trajectory of 10^n is given in A090074.

Links

Crossrefs

Cf. A065001, A070742, A077594, A090069, A090070, A090071, A090072, A090074.

A090074 (Presumed) last palindrome in the Reverse and Add! trajectory of 10^n.

Original entry on oeis.org

3654563, 678736545637876, 663305503366, 663787366, 88352682264077046228625388, 365468864563, 3654566654563, 36545633654563, 365456303654563, 3654563003654563, 36545630003654563, 365456300003654563
Offset: 0

Views

Author

Klaus Brockhaus, Nov 20 2003

Keywords

Comments

No further palindrome is reached in 5000 steps.
The number of palindromes in the Reverse and Add! trajectory of 10^n is given in A090075.

Links

Crossrefs

Cf. A065001, A070742, A077594, A090069, A090070, A090071, A090072, A090075.

Formula

a(n) = 3654563*10^(n) + 3654563 for n > 5.
Showing 1-2 of 2 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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