A056934 Antichains (or order ideals) in the poset 2*2*7*n or size of the distributive lattice J(2*2*7*n).

1, 540, 75966, 4701698, 164489084, 3764727340, 61951251333, 782318812002, 7946895019096, 67270102239520, 487605585591870, 3092040981805272, 17451258588313354, 88902214572208640, 413569247116248032

Offset: 0

Author

Mitch Harris

Keywords

• nonn
• easy

References

• Berman and Koehler, Cardinalities of finite distributive lattices, Mitteilungen aus dem Mathematischen Seminar Giessen, 121 (1976), p. 103-124

Links

• J. Berman and P. Koehler, Cardinalities of finite distributive lattices, Mitteilungen aus dem Mathematischen Seminar Giessen, 121 (1976), 103-124. [Annotated scanned copy]
• Index entries for sequences related to posets

Crossrefs

Cf. A000372, A006360, A006361, A006362, A056932, A056933, A056935, A056936, A056937.