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A195308
a(n) = A005291(n) + A005291(n+1).
0
1, 1, 1, 2, 3, 5, 7, 11, 15, 22, 30, 43, 58, 81, 109, 150, 200, 271, 359, 481, 633, 838, 1095, 1438, 1867, 2430, 3136, 4053, 5200, 6676, 8519
OFFSET
1,4
COMMENTS
This sequence arises from A005291 in the same way as A000041 arises from A182712.
Observation: a(3)..a(13) coincide with a sequence related to Stirling's numbers from the Jordan's book.
REFERENCES
C. Jordan, Calculus of finite differences, Chelsea Publishing Co. (1965), chapter IV, 153-155.
FORMULA
a(n) = A000041(n-2), 2 <= n <= 11. - Omar E. Pol, Feb 24 2013
KEYWORD
nonn,more
AUTHOR
Omar E. Pol, Feb 03 2012
STATUS
approved