A138848 Diagonal sums of a Collatz triangle.

1, 2, 5, 10, 10, 13, 16, 25, 40, 42, 51, 49, 65, 58, 83, 94, 108, 143, 141, 208, 184, 294, 241, 333, 319, 486, 424, 689, 559, 959, 744, 1082, 990, 1251, 1319, 1470, 1478, 1765, 2047, 2144, 2330, 2649, 2707, 2900, 2874, 3011, 3096, 3455

Offset

0,2

Comments

Diagonal sums of A138895.

Links

Table of n, a(n) for n=0..47.

Formula

a(n)=sum{k=0..floor(n/2), A092892(n-2k)}

Crossrefs

Sequence in context: A097378 A078310 A359487 * A194350 A182179 A123466

Adjacent sequences: A138845 A138846 A138847 * A138849 A138850 A138851

Keyword

easy,nonn

Author

Paul Barry, Mar 31 2008, Apr 02 2008

Status

approved