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A144271
Row sums of triangle A144270 (called S2hat(-1)).
2
1, 2, 5, 21, 129, 1099, 11647, 148292, 2190302, 36842892, 694276152, 14488348603, 331537914373, 8254117606799, 222087256536602, 6421589319659283, 198565371839434761, 6538245667687424041, 228396692050813678534, 8436237099236470594589
OFFSET
1,2
FORMULA
a(n) = Sum_{m=1..n} A144270(n,m), n>=1.
CROSSREFS
Cf. A144270.
Sequence in context: A243272 A139153 A180998 * A193189 A358316 A176527
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Oct 09 2008
STATUS
approved