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A104472 Triangle of degree numbers for certain polynomials. 2
1, 2, 4, 3, 5, 8, 4, 8, 11, 15, 5, 9, 12, 16, 21, 6, 12, 18, 22, 27, 33, 7, 13, 19, 23, 28, 34, 41, 8, 16, 22, 30, 35, 41, 48, 56, 9, 17, 26, 34, 39, 45, 52, 60, 69, 10, 20, 29, 37, 47, 53, 60, 68, 77, 87, 11, 21, 30, 38, 48, 54, 61, 69, 78, 88, 99, 12, 24, 36, 48, 58, 70, 77, 85 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

This is the array ay(N,m)= A104471(n+m-1,m) with numbers m>N omitted because they are identical with ay(N,N).

a(n,m)=sum(j*floor(n/j),j=1..m), n>=m and zero else (but actually one should repeat the a(n,n) numbers for n<m).

LINKS

Table of n, a(n) for n=1..74.

W. Lang: First 10 rows.

EXAMPLE

[1]; [2,4]; [3,5,8]; [4,8,11,15]; [5,9,12,16,21]; ...

CROSSREFS

Main diagonal a(n, n)= A024916(n), n>=1.

Sequence in context: A232798 A155850 A134464 * A316964 A187790 A307613

Adjacent sequences:  A104469 A104470 A104471 * A104473 A104474 A104475

KEYWORD

nonn,easy,tabl

AUTHOR

Wolfdieter Lang, Mar 24 2005

STATUS

approved

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Last modified April 4 05:34 EDT 2020. Contains 333212 sequences. (Running on oeis4.)