A195308 a(n) = A005291(n) + A005291(n+1).

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.

Links

Table of n, a(n) for n=1..31.

Formula

a(n) = A000041(n-2), 2 <= n <= 11. - Omar E. Pol, Feb 24 2013

Crossrefs

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

Sequence in context: A326589 A024794 A326292 * A218025 A091955 A091584

Adjacent sequences: A195305 A195306 A195307 * A195309 A195310 A195311

Keyword

nonn,more

Author

Omar E. Pol, Feb 03 2012

Status

approved