A195308 - OEIS

%I #30 Feb 26 2013 17:55:21

%S 1,1,1,2,3,5,7,11,15,22,30,43,58,81,109,150,200,271,359,481,633,838,

%T 1095,1438,1867,2430,3136,4053,5200,6676,8519

%N a(n) = A005291(n) + A005291(n+1).

%C This sequence arises from A005291 in the same way as A000041 arises from A182712.

%C Observation: a(3)..a(13) coincide with a sequence related to Stirling's numbers from the Jordan's book.

%D C. Jordan, Calculus of finite differences, Chelsea Publishing Co. (1965), chapter IV, 153-155.

%F a(n) = A000041(n-2), 2 <= n <= 11. - _Omar E. Pol_, Feb 24 2013

%Y Cf. A000041, A005291, A087787, A100818, A182712, A194439, A195017.

%K nonn,more

%O 1,4

%A _Omar E. Pol_, Feb 03 2012