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A138848 Diagonal sums of a Collatz triangle. 1
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 (list; graph; refs; listen; history; text; internal format)
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: A258779 A097378 A078310 * 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

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Last modified August 25 03:01 EDT 2019. Contains 326318 sequences. (Running on oeis4.)