The On-Line Encyclopedia of Integer Sequences (OEIS)

A083291 revision #4

A083291

Triangular array read by rows: T(n,k) = k*floor(n/10) + n mod 10, 0<=k<=n.

0, 1, 1, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 3, 4, 5, 6, 7, 8, 9, 10, 11

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OFFSET

0,4

COMMENTS

A010879(n)=T(n,0);

A076314(0)=T(0,0), A076314(n)=T(n,1) for n>0;

A028897(n)=T(n,n) for n<=1, A028897(n)=T(n,2) for n>1;

A028898(n)=T(n,n) for n<=2, A028898(n)=T(n,3) for n>2;

A028899(n)=T(n,n) for n<=3, A028899(n)=T(n,4) for n>3;

A028900(n)=T(n,n) for n<=4, A028900(n)=T(n,5) for n>4;

A028901(n)=T(n,n) for n<=5, A028901(n)=T(n,6) for n>5;

A028902(n)=T(n,n) for n<=6, A028902(n)=T(n,7) for n>6;

A028903(n)=T(n,n) for n<=7, A028903(n)=T(n,8) for n>7;

A028904(n)=T(n,n) for n<=8, A028904(n)=T(n,9) for n>8;

T(n,n) = n for n<=9, T(n,10) = n for n>9;

A083292(n) = T(n,n).

LINKS

Table of n, a(n) for n=0..99.

Paolo Xausa, Table of n, a(n) for n = 0..11475 (rows 0..150 of the triangle, flattened).

EXAMPLE

From Paolo Xausa, May 22 2024: (Start)

Triangle begins: [0] 0; [1] 1, 1; [2] 2, 2, 2; [3] 3, 3, 3, 3; [4] 4, 4, 4, 4, 4; [5] 5, 5, 5, 5, 5, 5; [6] 6, 6, 6, 6, 6, 6, 6; [7] 7, 7, 7, 7, 7, 7, 7, 7;

[8] 8, 8, 8, 8, 8, 8, 8, 8, 8; [9] 9, 9, 9, 9, 9, 9, 9, 9, 9, 9; [10] 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10; ... (End)

MATHEMATICA

Table[k*Floor[n/10] + Mod[n, 10], {n, 0, 10}, {k, 0, n}] (* Paolo Xausa, May 22 2024 *)

CROSSREFS

Sequence in context: A185283 A214972 A225687 * A169894 A357930 A003056

Adjacent sequences: A083288 A083289 A083290 * A083292 A083293 A083294

KEYWORD

nonn,tabl

AUTHOR

Reinhard Zumkeller, Apr 23 2003

EXTENSIONS

Offset changed to 0 by Paolo Xausa, May 22 2024

STATUS

editing