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.

Previous Showing 11-13 of 13 results.

A164012 Zero together with row 12 of the array in A163280.

Original entry on oeis.org

0, 31, 62, 87, 124, 115, 186, 147, 232, 207, 250, 242, 372, 312, 364, 405, 464, 476, 558, 570, 640, 693, 726, 782, 888, 925, 962, 1026, 1092, 1160, 1230, 1302, 1376, 1452, 1530, 1610, 1692, 1776, 1862, 1950, 2040, 2132, 2226, 2322, 2420, 2520, 2622, 2726
Offset: 0

Views

Author

Omar E. Pol, Aug 08 2009

Keywords

Links

Crossrefs

Cf. A008578, A161344, A161345, A163280, A164000, A164011.

Formula

Conjecture: a(n) = A119412(n), n > 36. [R. J. Mathar, Jul 31 2010]

Extensions

Terms beyond a(12) from R. J. Mathar, Jul 31 2010

A163281 First differences of A163280.

Original entry on oeis.org

1, 2, -1, 3, 3, -4, 3, 4, 4, -9, 3, 5, 5, 5, -14, 3, 4, 6, 6, 6, -23, 9, -1, 7, 7, 7, 7, -32, 9, 1, 5, 8, 8, 8, 8, -45, 15, -1, 11, 1, 9, 9, 9, 9, -58, 15, 1, 13, -2, 10, 10, 10, 10, 10, -71, 17, 5, 17, -13, 11, 11, 11, 11, 11, 11, -90, 27, -1, 19, -11
Offset: 1

Views

Author

Omar E. Pol, Aug 08 2009

Keywords

Crossrefs

Cf. A161344, A163280, A163983, A164000.

Extensions

More terms from Michel Marcus, Feb 15 2014

A163983 Antidiagonal sums of A163280.

Original entry on oeis.org

1, 6, 18, 41, 77, 133, 210, 310, 445, 602, 810, 1049, 1347, 1693, 2068, 2545, 3028, 3613, 4256, 4987, 5817, 6711, 7640, 8783, 9962, 11157, 12454, 13992, 15615, 17310, 19194, 21113, 23108, 25325, 27852, 30412, 33158, 36019, 38920, 41877, 45230, 48686, 52528, 56593, 60399, 64406
Offset: 1

Views

Author

Omar E. Pol, Aug 08 2009

Keywords

Crossrefs

Cf. A163280, A161344, A164000.

Programs

  • PARI
    lista(nn) = my(v = apply(f, [1..nn^2]), cols = vector(nn, i, select(x->(x==i), v, 1))); vector(nn, i, sum(j=1, i, cols[j][i-j+1])); \\ Michel Marcus, Jan 23 2023

Extensions

More terms from Michel Marcus, Jan 23 2023
Definition corrected by Omar E. Pol, Jan 24 2023
Previous Showing 11-13 of 13 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.