A026050 a(n) = (d(n)-r(n))/2, where d = A026049 and r is the periodic sequence with fundamental period (1,0,0,1).

59, 78, 102, 132, 170, 217, 273, 339, 417, 508, 612, 730, 864, 1015, 1183, 1369, 1575, 1802, 2050, 2320, 2614, 2933, 3277, 3647, 4045, 4472, 4928, 5414, 5932, 6483, 7067, 7685, 8339, 9030, 9758, 10524, 11330, 12177, 13065, 13995, 14969, 15988, 17052, 18162, 19320, 20527, 21783, 23089

Offset

7,1

Links

Table of n, a(n) for n=7..54.

Formula

Conjecture: G.f. x^7*( 59-158*x+203*x^2-202*x^3+145*x^4-45*x^5 ) / ( (x^2+1)*(x-1)^4 ). - R. J. Mathar, Jun 22 2013

Crossrefs

Sequence in context: A106913 A212266 A322919 * A347804 A304356 A283146

Adjacent sequences: A026047 A026048 A026049 * A026051 A026052 A026053

Keyword

nonn

Author

Clark Kimberling

Status

approved