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.

A069737 Integer quotient defining A068418 is 3.

Original entry on oeis.org

1320, 3696, 5520, 13800, 19872, 22560, 23688, 87000, 89964, 366720, 785808, 1235052, 1470720, 8690112, 45986616, 46862592, 78584640, 142588224, 231718968, 235668528, 377425920, 1598249952, 9518204448, 12026499072, 40964894160, 65368504980
Offset: 1

Views

Author

Labos Elemer, Apr 05 2002

Keywords

Examples

			40th term in A068418 is m=142588224, sum-of-proper-divisors[m]=294860736, cototient[m]=98286912, quotient=3=294860736/98286912,

Crossrefs

Cf. A068418, A068414, A069714.

Formula

(Sum of proper divisors[m])/cototient[m]=3, where m is a term of A068418.

Extensions

More terms from Labos Elemer, Apr 22 2002
a(22)-a(26) from Donovan Johnson, May 27 2011

A069719 Integer quotients arising in A068418: sum of proper divisors is divided by cototient of terms of A068418.

Original entry on oeis.org

2, 2, 2, 2, 3, 2, 2, 2, 3, 3, 3, 2, 3, 3, 3, 2, 2, 3, 3, 2, 2, 3, 3, 4, 2, 3, 2, 2, 3, 4, 2, 2, 3, 3, 3, 2, 2, 3, 4, 3, 2, 3, 3, 2, 3, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 4, 2, 3, 3, 2, 2, 2, 4, 2, 2, 2, 3, 3
Offset: 1

Views

Author

Labos Elemer, Apr 05 2002

Keywords

Examples

			n=39: m=A068418(39)=130141440, sigma[m]-m=405550080, m-Phi[m]=101387520, quotient=4=a(39).

Crossrefs

Cf. A068418, A001065, A000203, A051953, A068414, A069714, A069737.

Formula

a(n) = A001065(A068418(n)) - A051953(A068418(n)).

Extensions

a(47)-a(68) from Donovan Johnson, May 27 2011
Showing 1-2 of 2 results.

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