A096581 - OEIS

A096581

Number of solid partitions non-symmetric under L^2 (L= 'time-lapse' symmetry operation) on solid partitions.

0, 2, 4, 12, 28, 68, 150, 336, 724, 1550, 3234, 6688, 13590, 27354, 54334

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

FORMULA

By definition, A000293(n) = A096580(n) + 2*a(n).

EXAMPLE

Solid partition [{{3,1,1,1},{3}},{{2,1}},{{1}},{{1}},{{1}}] lapses (L) into

[{{4,1},{2},{1},{1},{1}},{{1,1},{1}},{{1,1}}], then into

[{{2,1,1,1,1},{2,1},{2}},{{1,1}},{{1}},{{1}}], further into

[{{5,2,1},{2},{1},{1}},{{1,1,1}}] and returns after L^4 to

[{{3,1,1,1},{3}},{{2,1}},{{1}},{{1}},{{1}}]

MATHEMATICA

See link above.

CROSSREFS

KEYWORD

nonn,more

AUTHOR

STATUS

approved