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.

A156981 Numbers n with property that n^2 and (n+1)^2 have no common digits.

Original entry on oeis.org

0, 1, 2, 3, 4, 5, 6, 8, 14, 19, 22, 29, 44, 77, 94, 264, 1414, 5477
Offset: 1

Views

Author

Zak Seidov, Feb 20 2009

Keywords

Comments

Sequence is full, cf. A068802.

Crossrefs

Cf. A068802.

Programs

  • PARI
    isok(n) = length(setintersect(Set(digits(n^2)), Set(digits((n+1)^2)))) == 0; \\ Michel Marcus, Oct 15 2013

Formula

a(n) = sqrt(A068802(n)).