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, 10871, 13802, 17514, 22129, 27940, 35141, 44155, 55299, 69179, 86286, 107495, 133562, 165744, 205188, 253691, 312975, 385619

Offset: 1

Author

Omar E. Pol, Feb 03 2012

Keywords

• nonn

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

• Charles Jordan, Calculus of finite differences, Chelsea Publishing Co., 1965, chapter IV, pp. 153-155.

Crossrefs

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

Formula

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

Extensions

More terms from Amiram Eldar, May 17 2025