A083176 Arithmetic means of rows of A083173.

2, 6, 10, 21, 33, 52, 68, 95, 115, 174, 186, 259, 287, 344, 376, 477, 531, 610, 670, 781, 803, 948, 996, 1157, 1261, 1414, 1442, 1605, 1635, 1808, 2032, 2227, 2329, 2502, 2682, 2869, 2983, 3260, 3340, 3633, 3759, 3982, 4202, 4439, 4531, 4776, 5064, 5575

Offset

1,1

Comments

If p > 3 is a prime then a(p) = prime(p)*(p+1)/2.

Links

Table of n, a(n) for n=1..48.

Formula

a(n) = A083175(n)/n.

Prog

(PARI) for(i=1, 120, p=prime(i); s=p*((i-1)*(i))/2; t=sum(k=1, i-1, p*k); k=i; while(denominator((s+k*p)/i)>1, k++); t+=k*p; print1(t/i, ", ")) \\ Lambert Herrgesell (zero815(AT)googlemail.com), Dec 30 2005

Crossrefs

Cf. A083173, A083174, A083175.

Sequence in context: A272967 A067716 A125518 * A103628 A207382 A334344

Adjacent sequences: A083173 A083174 A083175 * A083177 A083178 A083179

Keyword

nonn

Author

Amarnath Murthy, Apr 26 2003

Extensions

More terms from Lambert Herrgesell (zero815(AT)googlemail.com), Dec 30 2005

Status

approved