login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A337658 Let M_k denote the addition table for the first k terms of A337655. M_k contains exactly k*(k+1)/2 distinct numbers, and these numbers are a subset of the entries in M_{k+1}. The present sequence consists of the numbers that never appear in any M_k. 6
1, 5, 11, 13, 15, 18, 19, 21, 25, 26, 28, 31, 34, 35, 39, 40, 41, 42, 43, 45, 47, 48, 49, 50, 54, 56, 58, 59, 60, 61, 63, 64, 66, 67, 68, 71, 74, 76, 77, 78, 79, 80, 82, 84, 85, 86, 87, 88, 89, 93, 94, 96, 98, 101, 104, 107, 109, 110, 111, 113, 114, 115, 117, 119, 120, 122, 124, 127 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, C++ program for A337658

PROG

(C++) See Links section.

CROSSREFS

Cf. A337655, A337656, A337657.

Sequence in context: A227146 A251965 A093685 * A206548 A206547 A295584

Adjacent sequences:  A337655 A337656 A337657 * A337659 A337660 A337661

KEYWORD

nonn

AUTHOR

Jean-Paul Delahaye, Oct 01 2020

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 6 00:51 EST 2021. Contains 349558 sequences. (Running on oeis4.)