|
Search: id:A074149
|
|
| |
|
| 1, 6, 15, 36, 65, 114, 175, 264, 369, 510, 671, 876, 1105, 1386, 1695, 2064, 2465, 2934, 3439, 4020, 4641, 5346, 6095, 6936, 7825, 8814, 9855, 11004, 12209, 13530, 14911, 16416, 17985, 19686, 21455, 23364, 25345, 27474, 29679, 32040, 34481, 37086
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
The odd indexed entries are the sums pertaining to the corresponding magic squares.
|
|
FORMULA
|
a(2n-1)=4n^3-6n^2+4n-1, a(2n)=4n^3+2n. a(n)=(n^3+n)/2 if n odd, n^3/2+n if n even. a(n)=n^3/2 + n(3+(-1)^n)/4. - Frank Adams-Watters (FrankTAW(AT)Netscape.net), Jul 17 2006
|
|
CROSSREFS
|
Cf. A074147, A074148, A061925, A006003, A061804.
Sequence in context: A127469 A103106 A074132 this_sequence A128443 A135854 A083011
Adjacent sequences: A074146 A074147 A074148 this_sequence A074150 A074151 A074152
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 28 2002
|
|
EXTENSIONS
|
More terms from Frank Adams-Watters (FrankTAW(AT)Netscape.net), Jul 17 2006
|
|
|
Search completed in 0.002 seconds
|
