A107255 a(n) = n^5 - 31*n + 31, with n*a(n) + n*( n - 1 )*31 = n^6.

1, 1, 181, 931, 3001, 7621, 16621, 32551, 58801, 99721, 160741, 248491, 370921, 537421, 758941, 1048111, 1419361, 1889041, 2475541, 3199411, 4083481, 5152981, 6435661, 7961911, 9764881, 11880601, 14348101, 17209531, 20510281, 24299101

Offset

1,3

Links

Table of n, a(n) for n=1..30.

Example

a(2)=1, 1 + 63 = 2^6; a(3) = 181, 181 + 243 + 305 = 3^6; a(4) = 931, 931 + 993 + 1055 + 1117 = 4^6

Crossrefs

Sequence in context: A142731 A229877 A067383 * A163442 A268520 A235975

Adjacent sequences: A107252 A107253 A107254 * A107256 A107257 A107258

Keyword

nonn

Author

Andras Erszegi (erszegi.andras(AT)chello.hu), May 14 2005

Status

approved