A073160 Sums of adjacent terms of A073159. Together, A073158, A073159 and A073160 include all the positive integers uniquely.

9, 17, 23, 25, 31, 42, 53, 63, 69, 71, 77, 84, 91, 102, 109, 112, 119, 127, 135, 145, 153, 157, 162, 172, 181, 185, 188, 194, 200, 204, 211, 222, 231, 237, 241, 245, 254, 263, 272, 279, 281, 288, 297, 306, 317, 324, 330, 338, 344, 348, 353, 362, 374, 383, 388

Offset: 1

Author

Paul D. Hanna, Jul 29 2002

Keywords

• easy
• nonn

Comments

a(n) is asymptotic to 7n.

Examples

			A073158:_1,2,4, 7, 5, 8,10,14,15,19,16,20,21,22,26,28,27,... A073159:__3,6,11,12,13,18,24,29,34,35,36,41,43,48,54,55,... A073160:___9,17,23,25,31,42,53,63,69,71,77,84,91,102,109,...
		

Links

• Sean A. Irvine, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A073158, A073159.

Formula

a(n) = A073159(n) + A073159(n-1), where A073159(0)=0.

Extensions

a(33) onward corrected by Sean A. Irvine, Nov 19 2024