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 1-1 of 1 results.

A373009 Decimal expansion of PentInv(1 + PentInv(2 + PentInv(3 + PentInv(4 + ... )))) where PentInv(n) = (1 + sqrt(1 + 24*n))/6.

Original entry on oeis.org

1, 5, 4, 7, 1, 5, 7, 5, 8, 7, 2, 9, 7, 8, 7, 6, 6, 6, 1, 2, 5, 8, 8, 0, 7, 9, 4, 0, 0, 8, 6, 5, 1, 8, 4, 8, 3, 6, 2, 0, 6, 4, 1, 3, 1, 3, 4, 6, 8, 5, 0, 5, 1, 3, 4, 9, 8, 1, 6, 5, 8, 8, 4, 7, 3, 3, 8, 7, 5, 9, 7, 9, 8, 0, 1, 1, 1, 2, 3, 0, 3, 5, 2, 6, 4, 5, 7, 3, 6, 5, 5, 3, 1, 5, 8, 0, 7, 3, 4, 9, 4, 2, 9, 6, 0, 1, 6, 4, 7, 7, 7
Offset: 1

Views

Author

Kelvin Voskuijl, May 22 2024

Keywords

Comments

The inverse of the pentagonal numbers is defined here as (1 + sqrt(1 + 24*n))/6.

Examples

			1.54715758729787666125880794008651848362064131346850513...

Crossrefs

Cf. A365747 (triangular inverse), A072449 (square root), A099874 (cubes).
Cf. A000326 (pentagonal numbers).
Showing 1-1 of 1 results.

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

Content is available under The OEIS End-User License Agreement.