A070770 b + c + d where b >= c >= d >= 0 ordered by b then c then d.

0, 1, 2, 3, 2, 3, 4, 4, 5, 6, 3, 4, 5, 5, 6, 7, 6, 7, 8, 9, 4, 5, 6, 6, 7, 8, 7, 8, 9, 10, 8, 9, 10, 11, 12, 5, 6, 7, 7, 8, 9, 8, 9, 10, 11, 9, 10, 11, 12, 13, 10, 11, 12, 13, 14, 15, 6, 7, 8, 8, 9, 10, 9, 10, 11, 12, 10, 11, 12, 13, 14, 11, 12, 13, 14, 15, 16, 12, 13, 14, 15, 16, 17, 18, 7

Offset

0,3

Links

Robert Israel, Table of n, a(n) for n = 0..10000

Formula

a(n) = A056556(n) + A056557(n) + A056558(n).

Maple

seq(seq(seq(b+c+d, d=0..c), c=0..b), b=0..10); # Robert Israel, Jun 21 2018

Prog

(PARI) for(x=0, 5, for(y=0, x, for(z=0, y, print1(x+y+z", ")))) \\ Charles R Greathouse IV, Sep 17 2015

Crossrefs

Cf. A001477, A051162, A070771, A070772 for similar sequences with different numbers of terms summed.

Sequence in context: A224962 A173540 A336264 * A292599 A071487 A124071

Adjacent sequences: A070767 A070768 A070769 * A070771 A070772 A070773

Keyword

nonn,look

Author

Henry Bottomley, May 06 2002

Status

approved