The OEIS is supported by the many generous donors to the OEIS Foundation.

 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 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A269497 Number of length-6 0..n arrays with no repeated value differing from the previous repeated value by one. 1
 40, 591, 3680, 14695, 44904, 114695, 257536, 524655, 990440, 1758559, 2968800, 4804631, 7501480, 11355735, 16734464, 24085855, 33950376, 46972655, 63914080, 85666119, 113264360, 147903271, 190951680, 243968975, 308722024, 387202815 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 6 of A269494. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = n^6 + 6*n^5 + 15*n^4 + 8*n^3 + 5*n^2 + 6*n - 1. Empirical: G.f.: x*(-40-311*x-383*x^2+54*x^3-34*x^4-7*x^5+x^6) / (x-1)^7. - R. J. Mathar, Mar 03 2016 EXAMPLE Some solutions for n=6 ..5. .0. .4. .0. .5. .3. .1. .5. .1. .5. .1. .2. .3. .0. .5. .3 ..0. .5. .0. .4. .4. .4. .0. .4. .3. .3. .6. .1. .1. .4. .1. .6 ..6. .2. .4. .5. .5. .3. .4. .1. .2. .4. .0. .3. .4. .6. .6. .0 ..6. .4. .2. .2. .1. .1. .5. .1. .0. .2. .5. .4. .2. .2. .6. .1 ..2. .1. .5. .2. .4. .2. .1. .0. .6. .3. .3. .5. .2. .2. .2. .0 ..2. .6. .5. .1. .1. .3. .6. .4. .0. .1. .4. .1. .1. .4. .1. .1 CROSSREFS Cf. A269494. Sequence in context: A107419 A159946 A185744 * A097823 A263953 A002847 Adjacent sequences: A269494 A269495 A269496 * A269498 A269499 A269500 KEYWORD nonn AUTHOR R. H. Hardin, Feb 28 2016 STATUS approved

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

Last modified December 6 05:22 EST 2022. Contains 358594 sequences. (Running on oeis4.)