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 1-3 of 3 results.

A080328 Smaller of the two Ulam numbers that sum to the n-th Ulam number.

Original entry on oeis.org

0, 0, 1, 1, 2, 2, 3, 2, 3, 2, 8, 2, 8, 2, 11, 1, 6, 4, 26, 16, 3, 8, 13, 18, 28, 2, 3, 4, 8, 57, 62, 36, 48, 3, 53, 69, 2, 3, 2, 87, 8, 26, 3, 13, 2, 47, 2, 3, 2, 47, 69, 2, 13, 102, 36, 97, 3, 8, 57, 2, 47, 2, 47, 97, 26, 8, 18, 2, 53, 3, 2, 47, 2, 3, 102, 69, 47, 69, 2, 97, 102
Offset: 1

Views

Author

Jud McCranie, Feb 15 2003

Keywords

Comments

The first two are zero because the Ulam sequence (A002858) is initialized for those terms. The larger term in the sum is in A080329 and the indices are in A080330 and A080331.

Examples

			The 11th Ulam number (26) is the sum of the 6th Ulam number (8) and the 10th Ulam number (18), so a(11)=8.

Links

Crossrefs

Cf. A002858, A080329, A080330, A080331.

A080330 Index in A002858 of the smaller of the two Ulam numbers that sum to the n-th Ulam number.

Original entry on oeis.org

0, 0, 1, 1, 2, 2, 3, 2, 3, 2, 6, 2, 6, 2, 7, 1, 5, 4, 11, 9, 3, 6, 8, 10, 12, 2, 3, 4, 6, 18, 19, 13, 16, 3, 17, 20, 2, 3, 2, 24, 6, 11, 3, 8, 2, 15, 2, 3, 2, 15, 20, 2, 8, 27, 13, 25, 3, 6, 18, 2, 15, 2, 15, 25, 11, 6, 10, 2, 17, 3, 2, 15, 2, 3, 27, 20, 15, 20, 2, 25, 27, 42, 2, 15
Offset: 1

Views

Author

Jud McCranie, Feb 15 2003

Keywords

Comments

The first two are zero because the Ulam sequence (A002858) is initialized for those terms. The terms of the sum are in A080328 and A080329 and the indices are in A080330 and A080331.

Examples

			The 11th Ulam number (26) is the sum of the 6th Ulam number (8) and the 10th Ulam number (18), so a(11)=6.

Links

Crossrefs

Cf. A002858, A080328, A080329, A080331.

Programs

  • PARI
    See Links section.

A080331 Index in A002858 of the larger of the two Ulam numbers that sum to the n-th Ulam number.

Original entry on oeis.org

0, 0, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 13, 15, 15, 17, 13, 17, 20, 20, 20, 20, 20, 25, 26, 27, 28, 20, 20, 27, 25, 33, 27, 28, 36, 37, 38, 27, 40, 38, 42, 42, 44, 40, 46, 47, 48, 42, 40, 51, 52, 38, 53, 44, 56, 56, 54, 59, 55, 61, 56, 53, 61, 65, 65, 67, 61, 69, 70
Offset: 1

Views

Author

Jud McCranie, Feb 15 2003

Keywords

Comments

The first two terms in this sequence are zero because the Ulam sequence (A002858) is initialized for those terms. The terms of the sum are in A080328 and A080329 and the indices are in A080330 and A080331.

Examples

			The 11th Ulam number (26) is the sum of the 6th Ulam number (8) and the 10th Ulam number (18), so a(11)=10.

Links

Crossrefs

Cf. A002858, A080328, A080329, A080330.

Programs

  • PARI
    See Links section.
Showing 1-3 of 3 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.