A022822 a(n) = [ (n+2)/(n-1) ] + [ (n+4)/(n-2) ] + ... + [ (3n-2)/1 ].

4, 9, 16, 22, 30, 38, 47, 54, 65, 73, 85, 91, 104, 114, 125, 134, 145, 157, 170, 178, 192, 200, 217, 225, 238, 251, 264, 272, 289, 299, 314, 324, 338, 352, 365, 375, 390, 402, 421, 428, 445, 455, 472, 484, 497, 511, 529, 539, 554, 566, 585, 591

Offset

2,1

Links

Table of n, a(n) for n=2..53.

Prog

(PARI) a(n) = sum(k=1, n-1, (3*n-2*k)\k); \\ Michel Marcus, Mar 24 2013

Crossrefs

Sequence in context: A313349 A313350 A152399 * A001639 A309138 A162207

Adjacent sequences: A022819 A022820 A022821 * A022823 A022824 A022825

Keyword

nonn

Author

Clark Kimberling

Status

approved