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A056378
Number of step shifted (decimated) sequences using exactly four different symbols.
2
0, 0, 0, 12, 60, 792, 1404, 10716, 31200, 205032, 349956, 3727932, 5065804, 41574312, 127199028, 517290132, 1041517620, 11195637720, 15012935676, 135825699612, 363040469732, 1746670165416, 3181465294092
OFFSET
1,4
COMMENTS
See A056371 for an explanation of step shifts.
REFERENCES
M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia. [See A056391 for pdf file of Chap. 2]
FORMULA
A056373(n)-4*A056372(n)+6*A056371(n)-4.
CROSSREFS
Cf. A056373.
Sequence in context: A355671 A108096 A056388 * A231026 A333969 A076504
KEYWORD
nonn
STATUS
approved