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A027038 a(n) = diagonal sum of right-justified array T given by A027023. 1
1, 1, 2, 5, 7, 18, 43, 103, 264, 687, 1809, 4836, 13049, 35493, 97218, 267857, 741791, 2063574, 5763595, 16155403, 45429488, 128121191, 362287433, 1026918632, 2917313257, 8304598593, 23685134746, 67669857661, 193652803391 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..28.

CROSSREFS

Sequence in context: A247323 A099357 A306918 * A173929 A173299 A097052

Adjacent sequences:  A027035 A027036 A027037 * A027039 A027040 A027041

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified July 15 20:24 EDT 2019. Contains 325056 sequences. (Running on oeis4.)